Cisco CCNA Practice Test 3 — Questions and Answers
Question 1: Which IPv6 address type is equivalent to the IPv4 private address space?
- Link-local
- Global unicast
- Unique local (Correct answer)
- Multicast
Correct answer: Unique local
Unique local addresses (FC00::/7) are the IPv6 equivalent of IPv4 private addresses, not routed on the public internet.
Question 2: What does the 'no shutdown' command do on a router interface?
- Removes the IP address from the interface
- Enables the interface that was administratively disabled (Correct answer)
- Saves the interface configuration
- Resets the interface counters
Correct answer: Enables the interface that was administratively disabled
The 'no shutdown' command brings up an interface that was placed in an administratively down state.
Question 3: Which EtherChannel protocol is an open standard negotiation protocol?
- PAgP
- LACP (Correct answer)
- HSRP
- DTP
Correct answer: LACP
LACP (Link Aggregation Control Protocol) is defined in IEEE 802.3ad and is an open standard for EtherChannel negotiation.
Question 4: A router receives a packet destined for 192.168.10.50. It has routes for 192.168.10.0/24 and 0.0.0.0/0. Which route does it use?
- 0.0.0.0/0 because it always takes priority
- 192.168.10.0/24 because it is the most specific match (Correct answer)
- Both routes are used with load balancing
- The packet is dropped due to ambiguity
Correct answer: 192.168.10.0/24 because it is the most specific match
Routers use the longest prefix match, so the more specific /24 route is preferred over the default route /0.
Question 5: Which layer of the OSI model does a switch primarily operate at?
- Layer 1
- Layer 2 (Correct answer)
- Layer 3
- Layer 4
Correct answer: Layer 2
Switches operate at Layer 2 (Data Link) and use MAC addresses to forward frames within a network.
Question 6: What is the purpose of NAT overload (PAT) in a network?
- To encrypt traffic between networks
- To allow multiple internal hosts to share a single public IP address using port numbers (Correct answer)
- To load balance traffic across multiple servers
- To prioritize certain types of traffic
Correct answer: To allow multiple internal hosts to share a single public IP address using port numbers
PAT (Port Address Translation) maps multiple private IP addresses to a single public IP by tracking unique source port numbers.
Question 7: Which command verifies EIGRP neighbor relationships on a Cisco router?
- show ip eigrp topology
- show ip route eigrp
- show ip eigrp neighbors (Correct answer)
- show eigrp interfaces
Correct answer: show ip eigrp neighbors
The 'show ip eigrp neighbors' command displays the EIGRP neighbor table including neighbor IP addresses and hold times.
Cisco CCNA Practice Test 3
Which IPv6 address type is equivalent to the IPv4 private address space?