CCNA 2 R&S Essentials Practice Final Skills Assessment – PT 2014

Thứ Năm, 20 tháng 2, 2014

CCNA 2 R&S Essentials Practice Final Skills Assessment – PT 2014

CCNA Routing and Switching
Routing and Switching Essentials

Practice Skills Assessment – Packet Tracer

A few things to keep in mind while completing this activity:

Do not use the browser Back button or close or reload any exam windows during the exam.
Do not close Packet Tracer when you are done. It will close automatically.
Click the Submit Assessment button in the browser window to submit your work.

Introduction

In this practice skills assessment, you will configure the Our Town network with single-area OSPFv2. In addition, you will configure router-on-a-stick routing between VLANs. You will also implement NAT, DHCP and access lists.

All IOS device configurations should be completed from a direct terminal connection to the device console.
Some values that are required to complete the configurations have not been given to you. In those cases, create the values that you need to complete the requirements. These values may include certain IP addresses, passwords, interface descriptions, banner text, and other values.
For the sake of time, many repetitive but important configuration tasks have been omitted from this activity. Many of these tasks, especially those related to device security, are essential elements of a network configuration. The intent of this activity is not to diminish the importance of full device configurations.

You will practice and be assessed on the following skills:

Configuration of initial device settings
IPv4 address assignment
Configuration and addressing of router interfaces
Configuration of a router as a DHCP server
Implementation of static and dynamic NAT
Configuration of the single-area OSPFv2 routing protocol
Configuration of a default route and static summary routes
Configuration of VLANs and trunks
Configuration of routing between VLANs
Configuration of ACL to limit device access

You are required to configure the following:

Police:

Configuration of initial router settings
Interface configuration and IPv4 addressing
Configuration of DHCP
Configuration of multiarea OSPFv2
Configuration of routing between VLANs

Central:

Interface configuration and IPv4 addressing
Configuration of multiarea OSPFv2
Configuration of IPv4 route summarization
Configuration and propagation of a default route
Configuration of static summary routes
Configuration of static and dynamic NAT
Configuration of ACLs

Fire:

Interface configuration and IPv4 addressing
Configuration of multiarea OSPFv2
Configuration of a static summary route

Police-SW1:

Configuration of VLANs
Assignment of switch ports to VLANs
Configuration of trunking
Configuration of unused switch ports

Police-SW2:

Configuration of VLANs
Assignment of switch ports to VLANs
Configuration of trunking
Configuration of unused switch ports

Internal PC hosts:

Configuration as DHCP clients

Addressing Tables

Note: You are provided with the networks that interfaces should be configured on. Unless you are told to do differently in the detailed instructions below, you are free to choose the host addresses to assign.

Addressing Table:

Device	Interface	Network	Comments
Police	S0/0/0	192.168.10.104/30	any address in the network
	Gi0/0.45	192.168.45.0/24	first address in the network
	Gi0/0.47	192.168.47.0/24	first address in the network
	Gi0/0.101	192.168.101.0/24	first address in the network
Central	S0/0/0	192.168.10.104/30	any address in the network
	S0/0/1	192.168.10.112/30	any address in the network
	S0/1/0	198.51.100.0/28	first address in the network
	Gi0/0	192.168.18.40/29	first address in the network
Fire	S0/0/0	192.168.10.124/30	second address in the network
Fire	S0/0/1	192.168.10.112/30	any address in the network
Police-SW1	VLAN 101	192.168.101.0/24	any address in the network
Police-SW2	VLAN 101	192.168.101.0/24	any address in the network

Pre-configured addresses for reference:

Device	Address
Town Server	192.168.18.46/29
NetAdmin Host	203.0.113.18
Outside Host	203.0.113.128
Public Server	209.165.201.235
S3 Host	192.168.200.10/24
S6 Host	192.168.201.10/24
S5 Host	192.168.202.10/24

VLAN Table:

VLAN Number	VLAN Name	VLAN Network	Device:Port
45	HR	192.168.45.0/24	Police-SW1: Fa0/10 Police-SW2: Fa0/3
47	records	192.168.47.0/24	Police-SW1: Fa0/15 Police-SW2: Fa0/21
101	comm	192.168.101.0/24	SVI

Instructions

All configurations must be performed through a direct terminal connection to the device consoles.

Step 1: Determine the Addresses to Assign

Determine the IP addresses that you will use for the required interfaces on the three routers and two switches. Use the information in the Addressing Table and follow the guidelines below:

Assign the first IP addresses in the networks that are provided in the Addressing Table to the LAN interfaces.
Assign the first address in the Central subnet to the interface that is connected to the Internet.
Assign any valid host address in the networks that are provided in the Addressing Table to the serial interfaces.
The host PCs will receive IP addresses over DHCP.

Step 2: Configure Police

Configure Police with the following:
Configure the router host name: PoliceDept

Router(config)# hostname PoliceDept

Prevent the router from attempting to resolve command line entries to IP addresses.

PoliceDept(config)# no ip domain-lookup

Protect privileged EXEC mode from unauthorized access with the MD5 encrypted password.

PoliceDept(config)# enable secret [password]

Prevent device status messages from interrupting command line entries at the device console.

PoliceDept(config)# line con 0

PoliceDept(config-line)# logging synchronous

Secure the router console and terminal lines.

PoliceDept(config)# line console 0

password [password]

login

PoliceDept(config)# line vty 0 4

password [password]

login

Prevent all passwords from being viewed in clear text in the device configuration file.

PoliceDept(config)# service password-encryption

Configure a message-of-the-day banner.

PoliceDept(config)# banner motd “message-of-the-day”

Step 3: Configure the Router Physical Interfaces

Configure the interfaces of the routers for full connectivity with the following:

IP addresses as shown in the addressing table.
Describe the operational Police serial interface. The Police Ethernet interfaces will be configured at the end of this assessment.
DCE settings where appropriate. Use a rate of 128000.

PoliceDept(config)# interface Serial0/0/0
PoliceDept(config-if)#bandwidth 128
PoliceDept(config-if)#ip address 192.168.10.105 255.255.255.252
PoliceDept(config-if)#description Police and Central
PoliceDept(config-if)#clock rate 128000
PoliceDept(config-if)#no shutdown

Central(config)# interface Serial0/0/0
Central(config-if)#bandwidth 128
Central(config-if)#ip address 192.168.10.106 255.255.255.252
Central(config-if)#no shutdown

Central(config)# interface Serial0/0/1
Central(config-if)#bandwidth 128
Central(config-if)#ip address 192.168.10.114 255.255.255.252
Central(config-if)#clock rate 128000
Central(config-if)#no shutdown

Central(config)# interface g0/0
Central(config-if)#ip address 192.168.18.41 255.255.255.248
Central(config-if)#no shutdown

Central(config)# interface Serial0/1/0
Central(config-if)#ip address 198.51.100.1 255.255.255.240
Central(config-if)#no shutdown

Fire(config)# interface Serial0/0/1
Fire(config-if)#bandwidth 128
Fire(config-if)#ip address 198.51.100.1 255.255.255.240
Fire(config-if)#no shutdown

Step 4: Configure static and default routing

Configure the following static routes:

Manually configure default routes to the Internet. Use the exit interface argument. All hosts on the internal LANs and School Network networks should be able to reach the Internet.

PoliceDept(config)#ip route 0.0.0.0 0.0.0.0 s0/0/0

Central(config)#ip route 0.0.0.0 0.0.0.0 s0/1/0

Fire(config)#ip route 0.0.0.0 0.0.0.0 s0/0/1

It has been decided to use static routes to reach the branch networks that are connected to Fire. Use a single summary to represent the branch networks in the most efficient way possible. Configure the summary static route onCentral and Fire using the exit interface argument.

Central(config)#ip route 192.168.200.0 255.255.252.0 s0/0/1

Fire(config)#ip route 192.168.200.0 255.255.252.0 s0/0/0

Step 5: Configure OSPF Routing

Configure single-area OSPFv2 to route between all internal networks. The branch networks are not routed with OSPFv2.

Use a process ID of 10.The routers should be configured in area 0.
Use the correct inverse masks for all network statements. Do not use quad zero masks (0.0.0.0).

Step 6: Customize single-area OSPFv2

Customize single-area OSPFv2 by performing the following configuration tasks:

a. Set the bandwidth of the serial interfaces to 128 kb/s.

b. Configure OSPF router IDs as follows:

Police: 1.1.1.1
Central: 2.2.2.2
Fire: 3.3.3.3

c. Configure the OSPF cost of the link between Police and Central to 7500.

d. Prevent routing updates from being sent out of any of the LAN interfaces that are routed with OSPFv2. Do not use the default keyword in the commands you use to do this.

Configuration step 5 and step 6

PoliceDept(config)#router ospf 10

PoliceDept(config-router)#router-id 1.1.1.1

PoliceDept(config-router)#network 192.168.10.104 0.0.0.3 area 0
PoliceDept(config-router)#network 192.168.45.0 0.0.0.255 area 0
PoliceDept(config-router)#network 192.168.47.0 0.0.0.255 area 0
PoliceDept(config-router)#network 192.168.101.0 0.0.0.255 area 0

PoliceDept(config-router)#passive-interface g0/0.45
PoliceDept(config-router)#passive-interface g0/0.47
PoliceDept(config-router)#passive-interface g0/0.101

PoliceDept(config)#interface s0/0/0
PoliceDept(config-if)#bandwidth 128
PoliceDept(config-if)#ip ospf cost 7500

Central(config)#router ospf 10
Central(config-router)#router-id 2.2.2.2
Central(config-router)#network 192.168.10.104 0.0.0.3 area 0
Central(config-router)#network 192.168.10.112 0.0.0.3 area 0
Central(config-router)#network 192.168.18.40 0.0.0.7 area 0
Central(config-router)#passive-interface g0/0

Central(config)#interface s0/0/0
Central(config-if)#bandwidth 128
Central(config-if)#ip ospf cost 7500

Central(config)#interface s0/0/1
Central(config-if)#bandwidth 128

Fire(config)#router ospf 10
Fire(config-router)#router-id 3.3.3.3
Fire(config-router)#network 192.168.10.112 0.0.0.3 area 0

Fire(config)#interface s0/0/1
Fire(config-if)#bandwidth 128

Step 7: Configure VLANs and Trunking

Configure Police-SW1 and Police-SW2 with VLANs and trunk ports as follows:

Refer to the VLAN table above for the VLAN numbers and names that should be configured on both switches.
Configure names for the VLANs. The VLAN names must be configured to match the names in the VLAN Table exactly (case and spelling).

On Police-SW1

Police-SW1(config)#vlan 45
Police-SW1(config-vlan)#name HR

Police-SW1(config)#vlan 47
Police-SW1(config-vlan)#name records

Police-SW1(config)#vlan 101
Police-SW1(config-vlan)#name comm

On Police-SW2

Police-SW2(config)#vlan 45
Police-SW2(config-vlan)#name HR

Police-SW2(config)#vlan 47
Police-SW2(config-vlan)#name records

Police-SW2(config)#vlan 101
Police-SW2(config-vlan)#name comm

Configure the appropriate ports that link the switches and Police with the router as functioning trunk ports.

Police-SW1(config)#int g1/1
Police-SW1(config-if)#switchport mode trunk
Police-SW1(config-if)#no shutdown

Police-SW1(config)#int g1/2
Police-SW1(config-if)#switchport mode trunk
Police-SW1(config-if)#no shutdown

Police-SW2(config)#int g1/1
Police-SW2(config-if)#switchport mode trunk
Police-SW2(config-if)#no shutdown

Assign the switch ports shown in the table as access ports in the VLANs as indicated in the VLAN Table.

Police-SW1(config)#int fa0/10
Police-SW1(config-if)#switchport mode access
Police-SW1(config-if)#switchport access vlan 45
Police-SW1(config-if)#exit

Police-SW1(config)#int fa0/15
Police-SW1(config-if)#switchport mode access
Police-SW1(config-if)#switchport access vlan 47
Police-SW1(config-if)#exit

Police-SW2(config)#int fa0/3
Police-SW2(config-if)#switchport mode access
Police-SW2(config-if)#switchport access vlan 45
Police-SW2(config-if)#exit

Police-SW2(config)#int fa0/21
Police-SW2(config-if)#switchport mode access
Police-SW2(config-if)#switchport access vlan 47
Police-SW2(config-if)#exit

Address VLAN 101 on the network indicated in the VLAN Table. Note that the first address in this network will be assigned to the router in a later step in this assessment. The management interfaces of both switches should configured to be reachable by hosts on other networks.

Police-SW1(config)#ip default-gateway 192.168.101.1
Police-SW1(config)#interface vlan 101
Police-SW1(config-if)#ip address 192.168.101.2 255.255.255.0

Police-SW2(config)#ip default-gateway 192.168.101.1
Police-SW2(config)#interface vlan 101
Police-SW2(config-if)#ip address 192.168.101.3 255.255.255.0

Configure all unused switch ports as access ports, and shutdown the unused ports.

Police-SW1(config)#int range fa0/1-9, fa0/11-14, fa0/16-24
Police-SW1(config-if-range)#switchport mode access
Police-SW1(config-if-range)#shutdown

Police-SW2(config)#int range fa0/1-2, fa0/4-20, fa0/22-24
Police-SW2(config-if-range)#switchport mode access
Police-SW2(config-if-range)#shutdown

Step 8: Configure DHCP

Police should be configured as a DHCP server that provides addressing to the hosts attached to Police-SW1 and Police-SW2. The requirements are as follows:

Use VLAN45 and VLAN47 as the pool names. Note that the pool names must match the names given here exactly, all capital letters and exact spelling.
Addresses .1 to .20 should be reserved for static assignment from each pool.

The first address in each network will be assigned to the router interface attached to the networks as shown in the addressing table.
Use a DNS server address of 192.168.18.100. This server has not yet been added to the network, but the address must be configured.
Ensure that hosts in each LAN are able to communicate with hosts on remote networks.

PoliceDept(config)#ip dhcp excluded-address 192.168.45.1 192.168.45.20
PoliceDept(config)#ip dhcp excluded-address 192.168.47.1 192.168.47.20

PoliceDept(config)#ip dhcp pool VLAN45
PoliceDept(dhcp-config)#network 192.168.45.0 255.255.255.0
PoliceDept(dhcp-config)#default-router 192.168.45.1
PoliceDept(dhcp-config)#dns-server 192.168.18.100

PoliceDept(config)#ip dhcp pool VLAN47
PoliceDept(dhcp-config)#network 192.168.47.0 255.255.255.0
PoliceDept(dhcp-config)#default-router 192.168.47.1
PoliceDept(dhcp-config)#dns-server 192.168.18.100

*Set Clients to DHCP*

PC1, PC2, PC3, PC4

Step 9: Configure NAT

Configure NAT to translate internal private addresses into public addresses for the Internet. The requirements are:

a. Configure static NAT to the Town Server.

Translate the internal address of the server to the address 198.51.100.14.
Configure the correct interfaces to perform this NAT translation.

Central(config)#ip nat inside source static 192.168.18.46 198.51.100.14
Central(config)#interface g0/0
Central(config-if)#ip nat inside

Central(config)#interface s0/1/0
Central(config-if)#ip nat outside

b.Configure dynamic NAT (not NAT with overload, or PAT).

Use the addresses remaining in the public address subnet of 198.51.100.0/28. The first two addresses in the subnet have already been assigned to the Central and ISP serial interfaces. Also, another address has already been used in the static mapping in the step above.
Use a pool name of INTERNET. Note that the pool name must match this name exactly, in spelling and capitalization.
Hosts on each of the internal LANs shown in the topology and on all of the branch networks should be permitted to use the NAT addresses to access the Internet.
Use a source list number of 1.
Your source list should consist of three entries, one each for the LANs and one for the branch networks.

BY Boogie

ip nat pool INTERNET 198.51.100.3 198.51.100.13 netmask 255.255.255.240
ip nat inside source list 1 pool INTERNET
ip nat inside source static 192.168.18.46 198.51.100.14
ip access-list standard 1
permit 192.168.45.0 0.0.0.255
permit 192.168.47.0 0.0.0.255
permit 192.168.200.0 0.0.3.255

Step 10: Configure Access Control Lists

You will configure two access control lists to limit device access on Central. You should use the any and host keywords in the ACL statements as required. The ACL requirements are:

a. Restrict access to the vty lines on Central:

Create a named standard ACL using the name MANAGE. Be sure that you use this name exactly as it appears in these instructions (case and spelling).
Allow only the NetAdmin Host to access the vty lines of Central.
No other Internet hosts (including Internet hosts not visible in the topology) should be able to access the vty lines of Central.
Your solution should consist of a single ACL statement.

b.Allow outside access to the Town Server while controlling other traffic from the outside. Create the ACL as directed below:

Use access list number 101.
First, allow NetAdmin Host full access to all network hosts and devices.
Then, allow outside hosts to access the Town Server over HTTP only.
Allow traffic that is in response to data requests from the internal and School Network hosts to enter the network.
Add a statement so that counts of all denied traffic will be shown in the show access-lists command output.
Your ACL should have only four statements.

Your ACL should be placed in the most efficient location possible to conserve network bandwidth and device processing resources.

Step 11: Configure Router-on-a-Stick Inter-VLAN Routing.

Configure Police to provide routing between the VLANs configured on the switches. As follows:

Use the VLAN numbers for the required interface numbers.
Use the first addresses in the VLAN networks for the interfaces.

PoliceDept(config)# interface g0/0
PoliceDept(config-if)#no sh

PoliceDept(config)# interface g0/0.45
PoliceDept(config-subif)#encapsulation dot1Q 45
PoliceDept(config-subif)#ip address 192.168.45.1 255.255.255.0

PoliceDept(config)# interface g0/0.47
PoliceDept(config-subif)#encapsulation dot1Q 47
PoliceDept(config-subif)#ip address 192.168.47.1 255.255.255.0

PoliceDept(config)# interface g0/0.101
PoliceDept(config-subif)#encapsulation dot1Q 101
PoliceDept(config-subif)#ip address 192.168.101.1 255.255.255.0

Step 12: Test and Troubleshoot Connectivity.

Ensure that the hosts attached to the VLANs can reach hosts on the School Network and the Internet.

CCNA 2 v5.0 R&S Essentials Final Exam Answers 2014

Thứ Năm, 20 tháng 2, 2014

CCNA 2 v5.0 R&S Essentials Final Exam Answers 2014

Take Assessment

1.
What are two features of a link-state routing protocol? (Choose two.)
The database information for each router is obtained from the same source.
Routers send triggered updates in response to a change.
Routers create a topology of the network by using information from other routers.
Paths are chosen based on the lowest number of hops to the designated router.
Routers send periodic updates only to neighboring routers.

2.
Fill in the blank.
In IPv6, all routes are level ” 1 ” ultimate routes.

3.
Which switching method drops frames that fail the FCS check?

ingress port buffering
cut-through switching
store-and-forward switching
borderless switching

4.
Which summary IPv6 static route statement can be configured to summarize only the routes to networks 2001:db8:cafe::/58 through 2001:db8:cafe:c0::/58?

ipv6 route 2001:db8:cafe::/54 S0/0/0
ipv6 route 2001:db8:cafe::/60 S0/0/0
ipv6 route 2001:db8:cafe::/62 S0/0/0
ipv6 route 2001:db8:cafe::/56 S0/0/0

6.
When a Cisco switch receives untagged frames on a 802.1Q trunk port, which VLAN ID is the traffic switched to by default?

data VLAN ID
native VLAN ID
unused VLAN ID
management VLAN ID

7.
A college marketing department has a networked storage device that uses the IP address 10.18.7.5, TCP port 443 for encryption, and UDP port 4365 for video streaming. The college already uses PAT on the router that connects to the Internet. The router interface has the public IP address of 209.165.200.225/30. The IP NAT pool currently uses the IP addresses ranging from 209.165.200.228-236. Which configuration would the network administrator add to allow this device to be accessed by the marketing personnel from home?

ip nat pool mktv 10.18.7.5 10.18.7.5

ip nat inside source static tcp 10.18.7.5 443 209.165.200.225 443
ip nat inside source static udp 10.18.7.5 4365 209.165.200.225 4365

ip nat inside source static tcp 209.165.200.225 443 10.18.7.5 443
ip nat inside source static udp 209.165.200.225 4365 10.18.7.5 4365

No additional configuration is necessary.

ip nat outside source static 10.18.7.5 209.165.200.225

8.
Which statement describes a route that has been learned dynamically?

It is automatically updated and maintained by routing protocols.
It is unaffected by changes in the topology of the network.
It has an administrative distance of 1.
It is identified by the prefix C in the routing table.

9.
A network administrator is explaining to a junior colleague the use of the lt and gt keywords when filtering packets using an extended ACL. Where would the lt or gt keywords be used?

in an IPv6 extended ACL that stops packets going to one specific destination VLAN
in an IPv4 extended ACL that allows packets from a range of TCP ports destined for a specific network device
in an IPv4 named standard ACL that has specific UDP protocols that are allowed to be used on a specific server
in an IPv6 named ACL that permits FTP traffic from one particular LAN getting to another LAN

Refer to the exhibit. How did the router obtain the last route that is shown?

The ip address interface configuration mode command was used in addition to the network routing protocol configuration mode command.
The ipv6 route command was used.
the ip route command was used.
Another router in the same organization provided the default route by using a dynamic routing protocol.

Refer to the exhibit. A Layer 3 switch routes for three VLANs and connects to a router for Internet connectivity. Which two configurations would be applied to the switch? (Choose two.)

(config)# interface gigabitethernet 1/1
(config-if)# no switchport

(config-if)# ip address 192.168.1.2 255.255.255.252
(config)# interface vlan 1
(config-if)# ip address 192.168.1.2 255.255.255.0
(config-if)# no shutdown

(config)# interface gigabitethernet1/1
(config-if)# switchport mode trunk

(config)# interface fastethernet0/4
(config-if)# switchport mode trunk

(config)# ip routing

12.
A network contains multiple VLANs spanning multiple switches. What happens when a device in VLAN 20 sends a broadcast Ethernet frame?
Only devices in VLAN 20 see the frame.
Devices in VLAN 20 and the management VLAN see the frame.
Only devices that are connected to the local switch see the frame.
All devices in all VLANs see the frame.

the correct answer of question 13 is

1- Each router learns about its own directly connected networks.

2- Each router is responsible for “saying hello” to its neighbors on directly connected networks.

3- Each router builds a Link-State Packet (LSP) containing the state of each directly connected link

4- Each router floods the LSP to all neighbors, who then store all LSPs received in a database

5- Each router uses the database to construct a complete map of the topology and computes the best

14.
Which two packet filters could a network administrator use on an IPv4 extended ACL? (Choose two.)
computer type
source TCP hello address
ICMP message type
destination UDP port number
destination MAC address

Refer to the exhibit. R1 was configured with the static route command ip route 209.165.200.224 255.255.255.224 S0/0/0 and consequently users on network 172.16.0.0/16 are unable to reach resources on the Internet. How should this static route be changed to allow user traffic from the LAN to reach the Internet?
Add an administrative distance of 254.
Change the destination network and mask to 0.0.0.0 0.0.0.0
Change the exit interface to S0/0/1.
Add the next-hop neighbor address of 209.165.200.226.

16.
How is the router ID for an OSPFv3 router determined?

the highest IPv6 address on an active interface
the highest EUI-64 ID on an active interface
the highest IPv4 address on an active interface
the lowest MAC address on an active interface

17.
Two employees in the Sales department work different shifts with their laptop computers and share the same Ethernet port in the office. Which set of commands would allow only these two laptops to use the Ethernet port and create violation log entry without shutting down the port if a violation occurs?

switchport mode access
switchport port-security

switchport mode access
switchport port-security
switchport port-security maximum 2
switchport port-security mac-address sticky
switchport port-security violation restrict

switchport mode access
switchport port-security maximum 2
switchport port-security mac-address sticky

switchport mode access
switchport port-security maximum 2
switchport port-security mac-address sticky
switchport port-security violation protect

18.
Which two factors are important when deciding which interior gateway routing protocol to use? (Choose two.)

speed of convergence
scalability
ISP selection
the autonomous system that is used
campus backbone architecture

ultimate route

child route

default route

level 1 parent route

20.
What caused the following error message to appear?

01:11:12: %PM-4-ERR_DISABLE: psecure-violation error detected on Fa0/8, putting Fa0/8 in err-disable state
01:11:12: %PORT_SECURITY-2-PSECURE_VIOLATION: Security violation occurred, caused by MAC address 0011.a0d4.12a0 on port FastEthernet0/8.
01:11:13: %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/8, changed state to down
01:11:14: %LINK-3-UPDOWN: Interface FastEthernet0/8, changed state to down

An unauthorized user tried to telnet to the switch through switch port Fa0/8.
NAT was enabled on a router, and a private IP address arrived on switch port Fa0/8.
Port security was enabled on the switch port, and an unauthorized connection was made on switch port Fa0/8.
Another switch was connected to this switch port with the wrong cable.
A host with an invalid IP address was connected to a switch port that was previously unused.

21.
Which two statements are characteristics of routed ports on a multilayer switch? (Choose two.)

In a switched network, they are mostly configured between switches at the core and distribution layers.
They support subinterfaces, like interfaces on the Cisco IOS routers.
The interface vlan command has to be entered to create a VLAN on routed ports.
They are used for point-to-multipoint links.
They are not associated with a particular VLAN.

22.
A network administrator is adding ACLs to a new IPv6 multirouter environment. Which IPv6 ACE is automatically added implicitly at the end of an ACL so that two adjacent routers can discover each other?

permit ip any host ip_address
permit icmp any any nd-na
permit ip any any
deny ip any any

24.
What does the cost of an OSPF link indicate?
A lower cost indicates a better path to the destination than a higher cost does.
Cost equals bandwidth.
A higher cost for an OSPF link indicates a faster path to the destination.
Link cost indicates a proportion of the accumulated value of the route to the destination.

Refer to the exhibit. The Gigabit interfaces on both routers have been configured with subinterface numbers that match the VLAN numbers connected to them. PCs on VLAN 10 should be able to print to the P1 printer on VLAN 12. PCs on VLAN 20 should print to the printers on VLAN 22. What interface and in what direction should you place a standard ACL that allows printing to P1 from data VLAN 10, but stops the PCs on VLAN 20 from using the P1 printer? (Choose two.)

outbound
R2 S0/0/1
R1 S0/0/0
inbound
R1 Gi0/1.12
R2 Gi0/1.20

26.
On a switch that is configured with multiple VLANs, which command will remove only VLAN 100 from the switch?

Switch(config)# no vlan 100
Switch(config-if)# no switchport access vlan 100
Switch(config-if)# no switchport trunk allowed vlan 100
Switch# delete flash:vlan.dat

27.
A router needs to be configured to route within OSPF area 0. Which two commands are required to accomplish this? (Choose two.)

RouterA(config-router)# network 192.168.2.0 255.255.255.0 0
RouterA(config-router)# network 192.168.2.0 0.0.0.255 0
RouterA(config)# router ospf 1
RouterA(config-router)# network 192.168.2.0 0.0.0.255 area 0
RouterA(config)# router ospf 0

28.
What is a function of the distribution layer?

interconnection of large-scale networks in wiring closets
network access to the user
fault isolation
high-speed backbone connectivity

29.
A small-sized company has 20 workstations and 2 servers. The company has been assigned a group of IPv4 addresses 209.165.200.224/29 from its ISP. What technology should the company implement in order to allow the workstations to access the services over the Internet?

static NAT
dynamic NAT
port address translation
DHCP

30.
Which three requirements are necessary for two OSPFv2 routers to form an adjacency? (Choose three.)

The link interface subnet masks must match.
The two routers must include the inter-router link network in an OSPFv2 network command.
The OSPFv2 process ID must be the same on each router.

The OSPF hello or dead timers on each router must match.
The OSPFv2 process is enabled on the interface by entering the ospf process area-id command.
The link interface on each router must be configured with a link-local address.

31.
Which three pieces of information does a link-state routing protocol use initially as link-state information for locally connected links? (Choose three.)

the cost of that link
the type of network link
the link bandwidth
the link next-hop IP address
the link router interface IP address and subnet mask

32.
What is a disadvantage of NAT?

The internal hosts have to use a single public IPv4 address for external communication.
There is no end-to-end addressing.
The costs of readdressing hosts can be significant for a publicly addressed network.
The router does not need to alter the checksum of the IPv4 packets.

Refer to the exhibit. The partial configuration that is shown was used to configure router on a stick for VLANS 10, 30, and 50. However, testing shows that there are some connectivity problems between the VLANs. Which configuration error is causing this problem?

There is no IP address configured for the FastEthernet 0/0 interface.
A configuration for the native VLAN is missing.
The wrong VLAN has been configured on subinterface Fa0/0.50.
The VLAN IP addresses should belong to the same subnet.

Refer to the exhibit. R1 has been configured as shown. However, PC1 is not able to receive an IPv4 address. What is the problem?

R1 is not configured as a DHCPv4 server.
A DHCP server must be installed on the same LAN as the host that is receiving the IP address.
The ip address dhcp command was not issued on the interface Gi0/1.
The ip helper-address command was applied on the wrong interface.

35.
What best describes the operation of distance vector routing protocols?

They use hop count as their only metric.
They send their routing tables to directly connected neighbors.
They flood the entire network with routing updates.
They only send out updates when a new network is added.

36.
A network administrator is using the router-on-a-stick method to configure inter-VLAN routing. Switch port Gi1/1 is used to connect to the router. Which command should be entered to prepare this port for the task?

Switch(config)# interface gigabitethernet 1/1
Switch(config-if)# spanning-tree vlan 1

Switch(config)# interface gigabitethernet 1/1
Switch(config-if)# spanning-tree portfast

Switch(config)# interface gigabitethernet 1/1
Switch(config-if)# switchport mode trunk

Switch(config)# interface gigabitethernet 1/1
Switch(config-if)# switchport access vlan 1

37.
Which three advantages are provided by static routing? (Choose three.)

The path a static route uses to send data is known.
No intervention is required to maintain changing route information.
Static routing does not advertise over the network, thus providing better security.
Static routing typically uses less network bandwidth and fewer CPU operations than dynamic routing does.
Configuration of static routes is error-free.
Static routes scale well as the network grows.

38.
When configuring a switch to use SSH for virtual terminal connections, what is the purpose of the crypto key generate rsa command?

show active SSH ports on the switch
disconnect SSH connected hosts
create a public and private key pair
show SSH connected hosts
access the SSH database configuration

39.
Which information does a switch use to populate the MAC address table?

the destination MAC address and the outgoing port
the source MAC address and the incoming port
the source and destination MAC addresses and the incoming port
the source MAC address and the outgoing port
the source and destination MAC addresses and the outgoing port
the destination MAC address and the incoming port

Refer to the exhibit. A network administrator is configuring a router as a DHCPv6 server. The administrator issues a show ipv6 dhcp pool command to verify the configuration. Which statement explains the reason that the number of active clients is 0?

The IPv6 DHCP pool configuration has no IPv6 address range specified.
The state is not maintained by the DHCPv6 server under stateless DHCPv6 operation.
The default gateway address is not provided in the pool.
No clients have communicated with the DHCPv6 server yet.

41.
Open the PT Activity. Perform the tasks in the activity instructions and then answer the question.
What is the problem preventing PC0 and PC1 from communicating with PC2 and PC3?

The routers are using different OSPF process IDs.
The serial interfaces of the routers are in different subnets.
No router ID has been configured on the routers.
The gigabit interfaces are passive.

Which command will create a static route on R2 in order to reach PC B?

R1(config)# ip route 172.16.2.0 255.255.255.0 172.16.2.254
R1(config)# ip route 172.16.2.0 255.255.255.0 172.16.3.1
R1(config)# ip route 172.16.2.1 255.255.255.0 172.16.3.1
R1(config)# ip route 172.16.3.0 255.255.255.0 172.16.2.254

43.
Which problem is evident if the show ip interface command shows that the interface is down and the line protocol is down?

The no shutdown command has not been issued on the interface.
There is an IP address conflict with the configured address on the interface.
A cable has not been attached to the port.
An encapsulation mismatch has occurred.

44.
Which three values or sets of values are included when creating an extended access control list entry? (Choose three.)

access list number between 100 and 199
source subnet mask and wildcard mask
default gateway address and wildcard mask
source address and wildcard mask
destination subnet mask and wildcard mask
access list number between 1 and 99
destination address and wildcard mask

45.
A network administrator is designing an ACL. The networks 192.168.1.0/25, 192.168.0.0/25, 192.168.0.128/25, 192.168.1.128/26, and 192.168.1.192/26 are affected by the ACL. Which wildcard mask, if any, is the most efficient to use when specifying all of these networks in a single ACL permit entry?

0.0.0.127
0.0.0.255
0.0.1.255
0.0.255.255

A single ACL command and wildcard mask should not be used to specify these particular networks or other traffic will be permitted or denied and present a security risk.

46.
Which kind of message is sent by a DHCP client when its IP address lease has expired?

a DHCPREQUEST unicast message
a DHCPREQUEST broadcast message
a DHCPDISCOVER broadcast message
a DHCPDISCOVER unicast message

47.
What happens immediately after two OSPF routers have exchanged hello packets and have formed a neighbor adjacency?

They request more information about their databases.
They negotiate the election process if they are on a multiaccess network.
They exchange DBD packets in order to advertise parameters such as hello and dead intervals.
They exchange abbreviated lists of their LSDBs

48.
What benefit does NAT64 provide?

It allows sites to use private IPv4 addresses, and thus hides the internal addressing structure from hosts on public IPv4 networks.
It allows sites to connect multiple IPv4 hosts to the Internet via the use of a single public IPv4 address.
It allows sites to connect IPv6 hosts to an IPv4 network by translating the IPv6 addresses to IPv4 addresses.
It allows sites to use private IPv6 addresses and translates them to global IPv6 addresses.

49.
What is the purpose of setting the native VLAN separate from data VLANs?

The native VLAN is for routers and switches to exchange their management information, so it should be different from data VLANs.
A separate VLAN should be used to carry uncommon untagged frames to avoid bandwidth contention on data VLANs.
The native VLAN is for carrying VLAN management traffic only.
The security of management frames that are carried in the native VLAN can be enhanced

50.
Which command, when issued in the interface configuration mode of a router, enables the interface to acquire an IPv4 address automatically from an ISP, when that link to the ISP is enabled?

ip helper-address
ip address dhcp
ip dhcp pool
service dhcp

51.
Which statement is correct about IPv6 routing?

IPv6 routing is enabled by default on Cisco routers.
IPv6 routes appear in the same routing table as IPv4 routes.
IPv6 uses the link-local address of neighbors as the next-hop address for dynamic routes.
IPv6 only supports the OSPF and EIGRP routing protocols

52.
A router has used the OSPF protocol to learn a route to the 172.16.32.0/19 network. Which command will implement a backup floating static route to this network?

ip route 172.16.32.0 255.255.0.0 S0/0/0 100
ip route 172.16.32.0 255.255.224.0 S0/0/0 200
ip route 172.16.0.0 255.255.240.0 S0/0/0 200
ip route 172.16.0.0 255.255.224.0 S0/0/0 100

Refer to the exhibit. How many broadcast and collision domains exist in the topology?

5 broadcast domains and 11 collision domains
10 broadcast domains and 5 collision domains
16 broadcast domains and 11 collision domains
5 broadcast domains and 10 collision domains

54.
Which two commands can be used to verify the content and placement of access control lists? (Choose two.)

show processes
show cdp neighbor
show access-lists
show ip route
show running-config

55.
Which type of traffic would most likely have problems when passing through a NAT device?

IPsec
DNS
Telnet
HTTP
ICMP

56.
Open the PT Activity. Perform the tasks in the activity instructions and then answer the question.

Which keyword is displayed on the web browser?

NAT works!
Goodjob!
Welldone!
NAT configured!

Refer to the exhibit.

What summary static address would be configured on R1 to advertise to R3?

192.168.0.0/24
192.168.0.0/23
192.168.0.0/22
192.168.0.0/21

Fill in the blank.
Static routes are configured by the use of the ” ip route” global configuration command.

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CCNA v7 v8 Final Exam Answers 2024 - 2025

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