Complete question bank for CCNA 1 (ITN v7.02/v8) Modules 11 – 13: IPv4 Subnetting, VLSM, IPv6 SLAAC & ICMP Exam.
📥 Download CCNA 1 v7.02 & v8 (ITN) Modules 11 - 13: IP Addressing & Subnetting Exam Answers (Full Bank) Packet Tracer (.PKA) & Verified PDF Guide
Includes complete Cisco NetAcad v7.02 / v8 topology file (.pka) and IOS CLI configuration script.
Verified Cisco NetAcad Exam Questions (11 Core Questions + Explanations)
Question 1
How many usable host IPv4 addresses are available on the 192.168.10.128/26 subnet?
✔ Correct Answer: B. 62
Technical Explanation: A /26 mask leaves 6 host bits (32 - 26 = 6). Total usable hosts = 2^6 - 2 = 64 - 2 = 62 hosts (range 192.168.10.129 to 192.168.10.190, broadcast 192.168.10.191).
Question 2
What is the subnet address and broadcast address for a host with the IPv4 address 172.16.45.200/27?
✔ Correct Answer: A. Network: 172.16.45.192, Broadcast: 172.16.45.223
Technical Explanation: A /27 prefix increments in blocks of 32 in the fourth octet (0, 32, 64, 96, 128, 160, 192, 224). Therefore, 200 falls inside the 172.16.45.192/27 subnet, whose broadcast is 172.16.45.223.
Question 3
Which three IPv4 address ranges are reserved by RFC 1918 for private internal networks and cannot be routed on the public Internet? (Choose three.)
✔ Correct Answer: A. 10.0.0.0/8, B. 172.16.0.0/12, C. 192.168.0.0/16
Technical Explanation: RFC 1918 defines three private IPv4 blocks: 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16. (169.254.0.0/16 is APIPA link-local, and 127.0.0.0/8 is loopback).
Question 4
What is the fully compressed representation of the IPv6 address 2001:0db8:0000:0000:0ab0:0000:0000:0100?
✔ Correct Answer: B. 2001:db8::ab0:0:0:100
Technical Explanation: Rule 1: Omit leading zeros in each hextet (0db8 -> db8, 0ab0 -> ab0, 0100 -> 100, but never omit trailing zeros!). Rule 2: Use the double colon (::) only ONCE in an address to replace a contiguous string of all-zero hextets.
Question 5
Which IPv6 address type is used for one-to-nearest communication, where multiple devices share the same address and routers forward packets to the closest interface?
✔ Correct Answer: C. Anycast
Technical Explanation: IPv6 Anycast assigns the same unicast IPv6 address to multiple servers (such as DNS root servers), and routing protocols route client requests to the topologically nearest server.
Question 6
When an IPv6 host uses SLAAC (Stateless Address Autoconfiguration) to configure its own Global Unicast Address without a DHCPv6 server, which ICMPv6 message does it receive from the local router?
✔ Correct Answer: B. Router Advertisement (RA)
Technical Explanation: In SLAAC, the host sends an ICMPv6 Router Solicitation (RS) to FF02::2 (All-Routers multicast), and the router responds with a Router Advertisement (RA) containing the /64 network prefix and default gateway.
Question 7
Which subnet mask is best suited for a point-to-point WAN link between two routers to conserve IPv4 addresses while supporting broadcast?
✔ Correct Answer: C. 255.255.255.252 (/30)
Technical Explanation: A /30 mask (255.255.255.252) provides 2^2 - 2 = 2 usable host IP addresses, which is ideal for a point-to-point link between two router interfaces without wasting IPs.
Question 8
A Windows PC fails to contact a DHCPv4 server and automatically assigns itself the address 169.254.21.55/16. What type of address is this?
✔ Correct Answer: B. APIPA (Automatic Private IP Addressing) Link-Local Address
Technical Explanation: When a DHCPv4 client cannot reach a DHCP server, Windows uses APIPA to self-assign a link-local address from the 169.254.0.0/16 block.
Question 9
Which ICMP message type is used by both the 'ping' and 'traceroute' utilities to test network reachability?
✔ Correct Answer: B. Echo Request (Type 8) and Echo Reply (Type 0)
Technical Explanation: Ping (and Windows tracert) sends ICMP Echo Request messages and listens for ICMP Echo Reply (or ICMP Time Exceeded from intermediate hops).
Question 10
What is the prefix length and hexadecimal prefix for IPv6 Unique Local Addresses (ULAs), which are the IPv6 equivalent of IPv4 private addresses?
✔ Correct Answer: C. FC00::/7 (commonly FD00::/8)
Technical Explanation: IPv6 Unique Local Addresses (FC00::/7, typically starting with FD) are used for internal site addressing and are not routable on the global IPv6 Internet.
Question 11
In VLSM (Variable Length Subnet Masking), why must you always allocate subnets starting from the largest host requirement down to the smallest?
✔ Correct Answer: A. To prevent overlapping address blocks and ensure proper boundary alignment.
Technical Explanation: Sorting subnet requirements from largest to smallest ensures each block aligns cleanly on its bit boundary without overlapping previously assigned smaller subnets.
Modules 11-13 IPv4 Subnetting & IPv6 SLAAC Verification CLI
Cisco IOS CLI - Verification & Lab Script
Router# show ip interface brief Router# show ipv6 interface GigabitEthernet0/0/0 Router# ping 2001:db8:acad:1::10