Cisco Network Engineer Mock Interview

Master 30 Cisco Network Engineer interview questions covering routing protocols, network security, and troubleshooting scenarios.

Question 10 of 30

Can you explain the TCP/IP Model?

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William Swansen

William Swansen has worked in the employment assistance realm since 2007. He is an author, job search strategist, and career advisor who helps individuals worldwide and in various professions to find their ideal careers.

Network components and protocols are typically composed of several different layers. Each of these layers defines how the device or protocol moves the data across the network. It is important that you know the layers a device is broken into, how they interact with each other, and each layer's function. When defining these layers, start either at the bottom or the top and then move up or down, one layer at a time. It is also important to discuss how each layer relates to the adjacent one. Since Cisco is the dominant provider of network equipment, you will need to demonstrate your in-depth knowledge of network technologies throughout the interview. This is an example of the type of questions you can expect.

William Swansen

"The most widely used network protocol is TCP/IP. This stands for Transmission Control Protocol and Internet Protocol. TCP/IP specifies how data should be packaged, transmitted, and routed between devices across the network. This protocol has four layers:

Application Layer - This is the top layer in the TCP/IP model. It includes processes used to transmit data to their destinations. There are different application layer protocols including HTTP, FTP, SMTP, and SNMP.
Transport Layer - It receives the data from the application layer and manages the transmission of the data. TCP and UDP are common transport layer protocols.
Network Layer - This layer sends data across the network in packets. Packets contain the source & destination IP addresses and the data being transmitted.
Network Interface Layer - It is the lowest layer of the TCP/IP model. It transfers the packets between different nodes on the network."

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30Cisco Interview Questions & Answers

Competency

1.Please explain the important characteristics of computer networking.

Competency

2.Can you discuss some of the terminologies commonly used in networking?

Competency

3.What are the main types of networks, ranked by their sizes?

Competency

4.Can you define the various types of internet connections?

COmpetency

5.What are the different ways data is moved across networks?

Experience

6.What are the different types of network topologies you've worked with, and what are their advantages?

COmpetency

7.Can you describe the OSI reference model, its layers, and their purpose?

Competency

8.Can you describe the differences between a hub, switch, and router?

Competency

9.What are TCP and UDP, and how do they differ from one another?

Competency

10.Can you explain the TCP/IP Model?

Competency

11.What are HTTP and HTTPS, and what port do each of these protocols use?

Competency

12.What is the function of a Firewall in a network environment?

Competency

13.Can you describe what a DNS is and the services it provides?

COmpetency

14.How does a Domain differ from a Workgroup?

Experience

15.Do you have experience working with Proxy Servers? If so, how do you use them to protect a computer network similar to ours here at Cisco?

COmpetency

16.What are the IP classes that make up an IP address?

Competency

17.Is the IP address 127.0.0.1 a Class A IP?

Competency

18.What is a NIC?

Competency

19.What is the function of data encapsulation in transmitting information across the network?

Competency

20.What is a VPN? Are there different types of VPNs?

Competency

21.What are Ipconfig and Ifconfig, and how do they differ from each other?

Competency

22.Can you describe what a subnet mask is and how you will use it in your job as a Cisco network engineer?

Competency

23.What is a point-to-point link, and when would you use this?

Competency

24.Can you describe Network Address Translation or NAT and the function it provides?

Competency

25.Are you familiar with anonymous FTP, and can you provide the use case for it?

Competency

26.What is a UTP cable, and what is the maximum length allowed for one of these?

COmpetency

27.What is a private IP address, and when would you use this?

Scenario Based

28.What is a protocol you would use to send data from one network to another one?

Scenario Based

29.Can you describe some of the ways you would secure a Cisco computer network?

Experience

Cisco Network Engineer Mock Interview

Can you explain the TCP/IP Model?

30Cisco Interview Questions & Answers

1.Please explain the important characteristics of computer networking.

2.Can you discuss some of the terminologies commonly used in networking?

3.What are the main types of networks, ranked by their sizes?

4.Can you define the various types of internet connections?

5.What are the different ways data is moved across networks?

6.What are the different types of network topologies you've worked with, and what are their advantages?

7.Can you describe the OSI reference model, its layers, and their purpose?

8.Can you describe the differences between a hub, switch, and router?

9.What are TCP and UDP, and how do they differ from one another?

10.Can you explain the TCP/IP Model?

11.What are HTTP and HTTPS, and what port do each of these protocols use?

12.What is the function of a Firewall in a network environment?

13.Can you describe what a DNS is and the services it provides?

14.How does a Domain differ from a Workgroup?

15.Do you have experience working with Proxy Servers? If so, how do you use them to protect a computer network similar to ours here at Cisco?

16.What are the IP classes that make up an IP address?

17.Is the IP address 127.0.0.1 a Class A IP?

18.What is a NIC?

19.What is the function of data encapsulation in transmitting information across the network?

20.What is a VPN? Are there different types of VPNs?

21.What are Ipconfig and Ifconfig, and how do they differ from each other?

22.Can you describe what a subnet mask is and how you will use it in your job as a Cisco network engineer?

23.What is a point-to-point link, and when would you use this?

24.Can you describe Network Address Translation or NAT and the function it provides?

25.Are you familiar with anonymous FTP, and can you provide the use case for it?

26.What is a UTP cable, and what is the maximum length allowed for one of these?

27.What is a private IP address, and when would you use this?

28.What is a protocol you would use to send data from one network to another one?

29.Can you describe some of the ways you would secure a Cisco computer network?

30.What is a common way hackers attempt to shut down an organization's network?