Network Layer MCQs

Topic-wise practice questions for Computer Networks & Cloud Computing. Test your knowledge, check solutions on demand, and pace your preparation.

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Q1easy

What is a Default Route (0.0.0.0/0)?

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Q2easy

Which field in the IP header is used for Quality of Service (QoS) labeling?

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Q3hard

You have an IP address 192.168.1.0/26. How many usable host IP addresses are available in this subnet?

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Q4hard

(Code/Console Logic) A network admin checks the routing table. Based on the output below, what is the next hop for a packet destined for 10.0.5.1? netstat -rn


Destination    Gateway        Genmask
10.0.0.0       192.168.1.1    255.255.0.0
10.0.5.0       192.168.1.254  255.255.255.0
default        192.168.1.1    0.0.0.0

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Q5easy

How does an IP address 224.0.0.1 behave differently than a normal IP?

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Q6easy

What is the primary advantage of IPv6 over IPv4?

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Q7hard

What is the decimal representation of the CIDR prefix /24 in a subnet mask?

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Q8medium

Looking at this ping output, what is the most significant network diagnostic info? ping -c 4 google.com


64 bytes from 142.250.190.46: icmp_seq=1 ttl=115 time=24.5 ms
64 bytes from 142.250.190.46: icmp_seq=2 ttl=115 time=23.8 ms

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Q9easy

What is the "Default Gateway"?

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Q10easy

What is the role of ICMP (Internet Control Message Protocol)?

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