ACP Networking Fundamentals 3 — Questions and Answers
Question 1: Which IPv6 address type is equivalent to an IPv4 private address and is only routable within a local network segment?
- Global unicast
- Link-local (Correct answer)
- Loopback
- Unique local
Correct answer: Link-local
Link-local addresses (FE80::/10) are automatically assigned and only routable within the local link, similar to IPv4's APIPA addresses.
Question 2: What is the maximum transmission unit (MTU) for standard Ethernet frames?
- 512 bytes
- 1024 bytes
- 1500 bytes (Correct answer)
- 9000 bytes
Correct answer: 1500 bytes
Standard Ethernet MTU is 1500 bytes; frames exceeding this require fragmentation at the IP layer.
Question 3: Which routing protocol uses the Dijkstra shortest path first (SPF) algorithm?
- RIP
- EIGRP
- OSPF (Correct answer)
- BGP
Correct answer: OSPF
OSPF (Open Shortest Path First) uses Dijkstra's SPF algorithm to calculate the shortest path through a network topology.
Question 4: A network administrator needs to allow multiple VLANs to traverse a single link between two switches. Which configuration is required?
- Access port
- Trunk port (Correct answer)
- Routed port
- Hybrid port
Correct answer: Trunk port
A trunk port carries traffic for multiple VLANs using 802.1Q tagging, enabling VLAN propagation across switch-to-switch links.
Question 5: Which mechanism allows a router to translate private IP addresses to a single public IP address for outbound internet traffic?
- DHCP
- NAT/PAT (Correct answer)
- DNS
- ARP
Correct answer: NAT/PAT
NAT/PAT (Network Address Translation/Port Address Translation) maps multiple private addresses to one public IP using unique port numbers.
Question 6: What is the purpose of the 802.1Q VLAN tag inserted into an Ethernet frame?
- Encrypt the payload
- Identify which VLAN the frame belongs to (Correct answer)
- Specify the destination IP subnet
- Indicate QoS priority only
Correct answer: Identify which VLAN the frame belongs to
The 802.1Q tag contains a 12-bit VLAN ID field that identifies the VLAN membership of the frame as it traverses trunk links.
Question 7: Which protocol resolves a known IP address to its corresponding MAC address on a local network segment?
- DNS
- DHCP
- ARP (Correct answer)
- ICMP
Correct answer: ARP
ARP (Address Resolution Protocol) broadcasts a request for the MAC address associated with a known IPv4 address on the local subnet.
ACP Networking Fundamentals 3
Which IPv6 address type is equivalent to an IPv4 private address and is only routable within a local network segment?