Switches LAN/WAN Interview Question and Answer for Experienced/Switches LAN/WAN Interview Questions and Answers for Freshers & Experienced

What are the different types of transmission media?

Transmission media has two broad types –

<> Guided media (wired)
<> Unguided media (wireless)

Posted Date:- 2022-07-20 12:27:37

What do you mean by a synchronous transmission?

Synchronous transmission refers to continuous data streaming in the form of signals, accompanied by regular timing signals. These signals are generated by the external clocking mechanism and ensure that senders and receivers are in synchrony.

Posted Date:- 2022-07-20 12:26:06

What is an asynchronous transmission?

It is a serial mode of transmission. It is the process of data transmission, where every character is a self-contained unit. Each character in asynchronous transmission has its start and stop bits, along with an uneven interval between them.

Posted Date:- 2022-07-20 12:24:14

What is Piggy Backing?

It is the process of gaining access to a restricted communications channel by using an already established session by another user. This technique is known to improve the efficiency of the bidirectional protocols.

Posted Date:- 2022-07-20 12:23:14

Explain 10Base-T.

10Base-T specifies data transfer rate, i.e., 10Mbps. Here the usage of the term ‘Base’ defines ‘Baseband’ and not ‘Broadband’. T denotes the type of cable, which is a twisted pair.

Posted Date:- 2022-07-20 12:22:24

What is EGP? What are its advantages?

EGP stands for Exterior Gateway Protocol. It is used to exchange net-reachability information between Internet gateways within the same or different autonomous systems. EGP is the protocol of the routers. It is used to identify the set of networks that you will be able to reach within or via each independent system.

Posted Date:- 2022-07-20 12:21:12

Explain the different types of VPN.

There are two types of VPNs:

<> Remote Access Virtual Private Network:
A Remote Access VPN securely connects a device (endpoints like laptops, tablets, or smartphones) outside the corporate office. It allows a client to associate with a private network and access every one of its resources and services remotely. The connection between the private network and the user happens securely through the Internet. It is a low-cost solution and is helpful for both business and home users.

<> Site-to-Site or Router-to-Router Virtual Private Network:
This VPN is mostly used in large organizations with branches in different locations to connect the network of one office to another in different locations. It has two sub-categories:

Posted Date:- 2022-07-20 12:20:49

What is a Virtual Private Network (VPN)? What are the advantages of using a VPN Connection?

A VPN or Virtual Private Network is an encrypted connection (secure tunnel) built on the internet from a device to a network. It helps in the creation of a protected network between different networks using the internet (public network), ensuring that sensitive data is safely transmitted. This makes it difficult for third parties to gain unauthorized access, track your activities online, or steal data. By using the VPN, a client can connect to the organization’s network remotely.

Posted Date:- 2022-07-20 12:19:59

Is there a difference between a gateway and a router?

A gateway sends the data between two dissimilar networks, while a router sends the data between two similar networks.

Posted Date:- 2022-07-20 12:19:35

What is a Gateway?

A gateway is a hardware device that is connected to two or more networks. It may be a router, firewall, server, or any other similar device, and is capable of regulating traffic in the network.

Posted Date:- 2022-07-20 12:18:59

What are the Triggers?

Triggers are event-driven specialized procedures and are managed by database management systems. It is capable of performing complex actions and uses procedural languages full throttle.

Posted Date:- 2022-07-20 12:18:30

Which are the most typical functional units of the client/server applications?

The most typical functional units of the client/server applications are –

<> Presentation logic or user interface (e.g., ATMs)
<> Business logic (e.g., Account balance inquiry)
<> Data (e.g., Bank account records)

Posted Date:- 2022-07-20 12:18:07

What are and localhost?

Localhost is the standard hostname given to the machine, and it is represented by the IP address Therefore, we can say that and localhost are the same thing.

Posted Date:- 2022-07-20 12:17:34

What is Round Trip Time?

Round Trip Time or RTT is the time taken to send a message from one end of a network to the other and back.

Posted Date:- 2022-07-20 12:17:08

What Is BGP?

BGP or Border Gateway Protocol is a protocol used to transfer data and information between different host gateways or autonomous systems.

Posted Date:- 2022-07-20 12:16:27

What Is NVT?

NVT stands for Network Virtual Terminal and is a representation of a primary terminal. This virtual terminal helps you to start a telnet session.

Posted Date:- 2022-07-20 12:16:05

What is the difference between a Domain and a Workgroup?

This is one of the important networking interview questions that you must prepare for your interview. The main difference between a Domain and a Workgroup is where do the computer networks belong to. If it is a home network, then computers will be a part of a workgroup, and if it’s a workplace network, then the computers will be a part of a domain.

Posted Date:- 2022-07-20 12:15:42

What is the semantic gap?

Semantic gap is a difference between high-level programming sets in various computer languages and the simple computing instructions used by microprocessors.

Posted Date:- 2022-07-20 12:15:11

What is ifconfig?

It is an acronym for Interface Configuration and is used on Linux, Mac, and UNIX operating systems. ‘ifconfig’ configures and controls the TCP/IP network interface parameters from Command Line Interface while allowing the user to check the IP addresses of these network interfaces.

Posted Date:- 2022-07-20 12:13:31

What is ipconfig?

‘ipconfig’ is an acronym for Internet Protocol Configuration. We use ipconfig on Microsoft Windows to view and configure the network interface. It displays all TCP/IP network summary information available on a network and helps to modify the DHCP protocol and DNS settings.

Posted Date:- 2022-07-20 12:13:06

How will you recover data from a Virus-infected system?

We will install an OS and updated antivirus in a system that is free of any viruses, and then connect the hard drive of the infected system as a secondary drive. The hard drive will then be scanned and cleaned. Data can now be copied into the system.

Posted Date:- 2022-07-20 12:12:44

How would you differentiate between Firewall and Antivirus?

Both are security applications used in networking.

A firewall prevents unauthorized access in private networks as intranets. However, it does not protect against viruses, spyware, or adware.

An antivirus is a software that protects a computer from any malicious software, virus, spyware, or adware.

You may consider such networking interview questions to be basic, but such questions are the favourite of interviewers as interviewees often leave behind such networking interview questions while preparing.

Posted Date:- 2022-07-20 12:12:26

Name the cable which uses the RJ11 connector?

Telephone cables use the RJ11 connector.

Posted Date:- 2022-07-20 12:12:00

Mention the maximum length of the Thinnet cable?

The maximum length of the Thinnet cable is 185 meters.

Posted Date:- 2022-07-20 12:11:41

What is Brouter?

Brouter is a device that functions as both a bridge and a router. It forwards data within the networks and also routes data to individual systems in a network.

Posted Date:- 2022-07-20 12:11:23

What is ASCII?

American Standard Code for Information Interchange.

Posted Date:- 2022-07-20 12:11:01

What is IDEA?

IDEA is the abbreviation for International Data Encryption Algorithm. It is the replacement for the Data Encryption Standard (DES).

Posted Date:- 2022-07-20 12:10:46

Explain NOS.

Short form for Network Operating System. Specialized software that provides connectivity to a computer such that it can communicate with other computers and devices on a network.

Posted Date:- 2022-07-20 12:10:30

Explain NAT in networking.

Network Address Translation (NAT) is a protocol used to convert the IP address of the computer network into a local network to a single IP address. It takes all your local network devices and provides a single IP address to share a single connection to the internet. NAT is used router, computer, firewall in a local network.

Posted Date:- 2022-07-20 12:10:12

What is the difference between Communication and Transmission?

Transmission – A process of sending and receiving data between source and destination, in only one way. It is regarded as the physical movement of data.

Communication – A process of sending and receiving data between source and destination, in both ways.

Posted Date:- 2022-07-20 12:08:15

What is NIC?

NIC is the abbreviation for Network Interface Card. It is a peripheral card with electronic circuitry. It is attached to a PC and connects to a network. NIC has its own MAC address and this identifies a PC on the network.

Posted Date:- 2022-07-20 12:07:47

Can you tell me the main elements of a protocol?

There are three main elements of a protocol –

<> Syntax: It refers to the structure or format of the data and their order of presentation.
<> Semantics: It specifies the meaning of each section of bits.
<> Timing: Timing refers to two characteristics, which include the timing of data sending and the speed of data sending.

Posted Date:- 2022-07-20 12:05:51

Mention a few examples of private network addresses.

Few examples of private network addresses are: with a subnet cover of with subnet cover of with subnet cover of

Posted Date:- 2022-07-20 12:05:18

What is NAT?

It stands for Network Address Translation and is a protocol that allows a network device, usually a firewall, to assign a public address to a computer/s inside a private network.

Posted Date:- 2022-07-20 12:05:06

What is anonymous FTP?

With the help of an anonymous FTP, users can be granted access to files in public servers. Users can log in as anonymous guests, thus the name.

Posted Date:- 2022-07-20 12:04:52

What is a peer-peer process?

The processes on each machine that communicate at a given layer are called the peer-peer process.

Posted Date:- 2022-07-20 12:04:38

What is netstat?

Netstat is a command-line utility program that provides information about the current Transmission Control Protocol /Internet Protocol (TCP/IP) settings of a connection.

Posted Date:- 2022-07-20 12:02:30

What is a full-duplex?

It is a mode of communication between two devices and the data flow is bi-directional too, but the flow is simultaneous. One of the examples of full-duplex is a telephone.

Posted Date:- 2022-07-20 12:02:17

What is half-duplex?

It is the mode of communication between two devices. Here the data flows bi-directionally but simultaneously. A perfect example of a half-duplex is a walkie-talkie.

Posted Date:- 2022-07-20 12:02:02

What is RIP?

In networking, RIP is an abbreviation for Routing Information Protocol. It is a simple protocol that exchanges information between the routers.

Posted Date:- 2022-07-20 12:01:51

What is TELNET?

TELNET is a client-service protocol on the internet or local area network, allowing a user to log on to a remote device and have access to it. This is among the most commonly asked networking interview questions. Technically, it is a bidirectional interactive text-oriented communication facility, which uses a virtual terminal connection.

Posted Date:- 2022-07-20 12:01:35

What is a client-server model?

The client-server model or architecture is a communication framework for network processes. This framework is distributed among service requestors, clients, and service providers and offers them transparent access to applications, data, computing services or any other resource of the workgroup and/or across the organization, on multiple platforms.

Posted Date:- 2022-07-20 12:01:23

What are the types of errors?

There are two categories of errors –

<> Single-bit error – one-bit error per data unit
<> Burst error – Two or more bits errors per data unit

Posted Date:- 2022-07-20 12:01:10

Why is encryption on a network necessary?

Encryption is the process of changing data from its original readable format to an unreadable format, thus ensuring network security. It requires the user to use a secret key or password to decrypt the data.

Encryption is not only useful for communications, but also in any case where you want to protect sensitive information. Thus, it is possible to encrypt the information contained in disks, folders or even individual files, to prevent unauthorized access. Then, in addition to the benefit of protecting the privacy of users, data encryption prevents other types of attacks such as identity theft, or bank fraud, in addition to providing a protection mechanism against the theft or loss of devices with sensitive information.

Posted Date:- 2022-07-20 12:00:44

What common software problems lead to network defects?

It can be any or a combination of:

<> Application conflicts
<> Client-server problems
<> Configuration error
<> Protocol mismatch
<> Security issues
<> User policy & rights issues

Posted Date:- 2022-07-20 12:00:30

why the standard OSI model is known as 802.xx?

The OSI model was introduced in February 1980. In 802.XX, ‘80’ is named for the year 1980, and ‘2’ is named for the month of February.

Posted Date:- 2022-07-20 12:00:02

A gateway works in which layer of the OSI model?

Transport layer.

Posted Date:- 2022-07-20 11:59:50

What is TCP/IP?

TCP/IP is the short form of the Transmission Control Protocol / Internet Protocol. It is a set of protocol layers designed to facilitate data exchange on heterogeneous networks.

Posted Date:- 2022-07-20 11:53:19

What is SLIP?

SLIP or Serial Line Interface Protocol was developed during the early UNIX days and it is used for remote access.

SLIP does not provide error detection as it relies on higher-layer protocols for it. Therefore, SLIP alone is not successful on an error-prone dial-up connection. However, it is still useful to test the operating system’s response capabilities under load (looking at ping flood statistics).

Interviewers often ask such networking interview questions and you must prepare for such abbreviations.

Posted Date:- 2022-07-20 11:53:08

What are Nodes and Links?

Nodes – Devices or data points on a more extensive network are known as nodes. They are individual parts of a larger data structure and contain data. They also link other nodes.

Links- A link is the physical and logical network component for interconnecting hosts or nodes in a network. It is a physical communication medium such as a coaxial cable or optical fibre.

Posted Date:- 2022-07-20 11:52:56

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