Network Administrator Interview Questions

Practice for Network Administration interviews by solving TestDome questions. Our interview questions are used by more than 7,000 companies and 450,000 individual test takers.

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Need to practice your Network Administration skills for an upcoming job interview? Try solving these Network Administration interview questions that test knowledge of network security, application layers, MX records, and other skills. We’ll provide feedback on your answers, and you can use a hint if you get stuck.

These Network Administration interview questions are examples of real tasks used by employers to screen job candidates such as system administrators, network administrators, network engineers, and others that require knowledge of network infrastructure, networking protocols, and the Internet.

1. Email Spoofing

Email server Network security Spoofing attack

Employees of a company are facing lots of bounced email notifications from email addresses they have never sent messages to. Select the options below which are correct for the given scenario.

(Select all acceptable answers.)

Mail boxes of the company users are full, resulting in bounced emails.
Company email addresses seem to have been spoofed and used for spamming.
An email authentication method like DKIM can be used to prevent such incidents.
SMTP would prevent such incidents as emails can be sent reliably using it.
Having more than one email server would reduce such email bouncing incidents.

2. IP Privacy

Application layer IP Network security

Select the methods that can be used to hide your public IP address when making calls to a remote server over the internet.

(Select all acceptable answers.)

A Virtual Private Network.
A Proxy Server.
Using the HTTPS protocol.
The Transport Layer Security protocol.
Spoofing the device's MAC address.

3. Grouping Hosts

Network layer Routing Subnet

A computer network has hosts with the following IP addresses:


What is the routing prefix (in format: address of a network/bit-length of the prefix) for the smallest subnet that contains these four hosts?

124.127.64. /  


4. MX Record

Application layer DNS MX Record

The email service provider has provided only an IP address for the TestDome email server - TestDome owns the domain ''. Fill in the blanks for the correct DNS configuration, so that '' points to the email server.

Type Host Name Points To

If you feel ready, take one of our timed public Network Administrator Interview Questions tests:
Network Administration

Network Administration Online Test (Easy / Hard)

System Administration

System and Network Administration Online Test (Easy)

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