ACP Networking Fundamentals 2

Question 1

Which protocol operates at Layer 3 of the OSI model and is responsible for logical addressing and routing?

Accepted Answer

IP

Answer

IP (Internet Protocol) operates at OSI Layer 3 and handles logical addressing and packet routing between networks.

Question 2

What is the default subnet mask for a Class B IPv4 address?

Accepted Answer

255.255.0.0

Answer

Class B addresses (128.0.0.0–191.255.255.255) use a default subnet mask of 255.255.255.0, providing 16 network bits.

Question 3

Which switching method begins forwarding a frame as soon as the destination MAC address is read, before the full frame is received?

Accepted Answer

Cut-through

Answer

Cut-through switching forwards frames immediately after reading the destination MAC address, minimizing latency.

Question 4

What does the TTL field in an IP packet header primarily prevent?

Accepted Answer

Routing loops causing infinite circulation

Answer

TTL (Time to Live) prevents packets from circulating indefinitely by decrementing at each hop and discarding the packet when TTL reaches zero.

Question 5

In a full-duplex Ethernet connection, what is eliminated compared to half-duplex?

Accepted Answer

CSMA/CD collisions

Answer

Full-duplex Ethernet eliminates CSMA/CD collisions by allowing simultaneous send and receive on separate wire pairs.

(ACP) Aruba Certified Professional Certification Practice Test