CompTIA Networking Practice Test

Question 1

Which OSI model layer is responsible for logical addressing and routing packets between networks?

Accepted Answer

Layer 3 — Network

Answer

Layer 2 — Data Link

Answer

Layer 4 — Transport

Answer

Layer 1 — Physical

Question 2

A computer has the IP address 192.168.1.45 with a subnet mask of 255.255.255.0. What is the network address?

Accepted Answer

192.168.1.0

Answer

192.168.0.0

Answer

192.168.1.255

Answer

192.168.1.45

Question 3

What protocol is used to automatically assign IP addresses to devices on a network?

Accepted Answer

DHCP

Answer

DNS

Answer

ARP

Answer

ICMP

Question 4

What is the difference between TCP and UDP?

Accepted Answer

TCP is reliable and connection-oriented; UDP is faster but connectionless with no delivery guarantee

Answer

TCP is faster; UDP is slower but more reliable

Answer

TCP is used for video streaming; UDP is used for file transfers

Answer

TCP and UDP are identical protocols with different port numbers

Question 5

What is the primary function of a DNS server?

Accepted Answer

Translate domain names to IP addresses

Answer

Assign IP addresses dynamically to hosts

Answer

Filter network traffic based on security rules

Answer

Connect multiple networks together

Question 6

Which wireless security protocol provides the strongest encryption for a modern Wi-Fi network?

Accepted Answer

WPA3

Answer

WEP

Answer

WPA

Answer

WPA2-TKIP