GATE CS Computer Networks MCQ Questions

Q1easy

How many layers are in the OSI model?

A)4

B)5

C)6

D)7

Q2easy

Which layer is responsible for routing?

A)Data Link Layer

B)Network Layer

C)Transport Layer

D)Application Layer

Q3easy

What is the default port number for HTTP?

A)21

B)25

C)80

D)443

Q4easy

What is the main difference between TCP and UDP?

A)TCP is faster

B)TCP is connection-oriented, UDP is connectionless

C)UDP is more reliable

D)No difference

Q5easy

What is the purpose of the three-way handshake in TCP?

A)Terminate connection

B)Establish connection

C)Transfer data

D)Error recovery

Q6easy

What is the subnet mask for 192.168.1.0/24?

A)255.0.0.0

B)255.255.0.0

C)255.255.255.0

D)255.255.255.255

Q7medium

What is the maximum efficiency of pure ALOHA?

A)18%

B)37%

C)50%

D)100%

Q8medium

What is the maximum efficiency of slotted ALOHA?

A)18%

B)37%

C)50%

D)100%

Q9easy

What is the purpose of ARP (Address Resolution Protocol)?

A)Resolve IP to MAC address

B)Resolve MAC to IP address

C)Resolve domain to IP

D)Resolve IP to domain

Q10easy

What is the purpose of DNS?

A)Resolve IP to MAC

B)Resolve domain name to IP address

C)Resolve MAC to IP

D)Route packets

GATE CS - Computer Networks