Networking basics interview questions

1.
How long is an IPv6 address?
A. 32 bits
B. 128 bytes
C. 64 bits
D. 128 bits
Answer: Option D

Explanation:

An IPv6 address is 128 bits long.
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2.
What flavor of Network Address Translation can be used to have one IP address allow many users to connect to the global Internet?
A. NAT
B. Static
C. Dynamic
D. PAT
Answer: Option D

Explanation:

Port Address Translation (PAT) allows a one-to-many approach to network address translation.
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3.
What are the two main types of access control lists (ACLs)?
Standard
IEEE
Extended
Specialized
A. 1 and 3
B. 2 and 4
C. 3 and 4
D. 1 and 2
Answer: Option A

Explanation:

Standard and extended access control lists (ACLs) are used to configure security on a router.
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4.
What command is used to create a backup configuration?
A. copy running backup
B. copy running-config startup-config
C. config mem
D. wr mem
Answer: Option B

Explanation:

The command to back up the configuration on a router is copy running-config startup-config.
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5.
You have 10 users plugged into a hub running 10Mbps half-duplex. There is a server connected to the switch running 10Mbps half-duplex as well. How much bandwidth does each host have to the server?
A. 100 kbps
B. 1 Mbps
C. 2 Mbps
D. 10 Mbps
Answer: Option D

Explanation:

Each device has 10 Mbps to the server.