Computer Networks Interview Questions

Dora process is a Service it is a used to dscp ip address automatic update is called Dora process.

Dora process contains in DHCP, first the client searches for the required server by using Discover.
then the server gives a offer, then the client requests for its need, server gives the acknowledge

The role of a network administrator is
1. Installation of a new network.
2. Configuring a new network.
3. Maintaining and troubleshooting an existing network.

What are the four major roles of a network administrator?

DNS means Domain name Server or Domain name system. Requirement of DNS : DNS helps to convert the ip address into domain name.Domain name into ip address.You cannot remember many website ip address ...

Yes, DNS translates an IP address to a more simple name that's easier to use.  However, DNS has expanded beyond just that these days.  A network can and should have more than one DNS server.  You s...

telnet- 23
ftp-21/20
snmp- 161/162

Telnet = 23
SNMP = 161
FTP= 20 for connection establishment and 21 for Data Transfer.

An email client, email reader, or more formally mail user agent (MUA), is a computer program used to manage a users email..
1.email client is a client who change to any document in web page which he registered
2.web client is a client who doest be change anything only they were read the data

Email ClientEmail clients download your emails onto your computer. Using a specialized email program such as Outlook Express or Apple Mail has the advantage of giving you complete control over your em...

Subnetting means network divide into sub networks. It is used to reduce the network traffic or congestion.

Subnetting is the process of modifying of an IP network into smaller logical IP networks , known as subnets. In this process the address space of a unicast address prefix is divided to allocate th...

Subnetting divides one large network into several smaller ones. It adds an intermediate level of hierarchy in IP addressing.

To create or to perform subnet addressing the local address should be divided into a number identifying the physical network and a number identifying the host on the subnet. Then the senders route m...

In a workgroup: All computers are peers; no computer has control over another computer. Each computer has a set of user accounts. To use any computer in the workgroup, you must have an account on th...

Domain can be accessed from anywhere in the world were internet is provided, while workgroup is a small network which can be accessed only if we are in that network.

Such a path is a path which virtual physically possible. The path from Source to Destination cover every Node. It makes virtual circuit.

A bundle of virtual channels which share the same end point is known as virtual path.Each virtual path is identified by its unique virtual path identifier (VPI). All channels within a single path must...

5-4-3 rule is a guideline for Ethernet computer networks along with the number of repeaters and segments on shared-access. The rule says that in an network there can be no more than five network segme...

Sending one packet of message to several destinations is known as multicast routing and algorithm which defines its route is known as multicast routing algorithm.

Mail gateway is a means which connect two or more electronic mail system and helps in transfer of message between them.During complex mapping and translation there is a store and forward scheme where ...

Gateway-to-Gateway Protocol is similar to the Transmission Control Protocol (TCP) and the User Datagram Protocol (UDP).
It is a protocol used for routing datagrams between Internet gateways.Each GGP message has a field header that identifies the message type and the format of the remaining fields.

Within an autonomous system the interior gateway protocol (IGP) is used to exchange routing information.
There are two types of IGP
1.Distance-vector routing protocol
2.Link-state routing protocol.

A virtual channel defines a single point to point connection, identified by its virtual channel identifier.An individual channel can be uniquely identified by its virtual channel and virtual path numb...

What is terminal server and how to work in a terminal server.

Terminal emulation is the ability to make one computer terminal appear like some other terminal. Terminal emulation is used to give the users the ability to log on and get direct access to legacy pro...

Beaconing is a process which allows the network to render their network problems by them-selfToken ring and FDDI(Fibre Distributed Data Interface) networks make use of this process. It is also a sign...

Across LANs and WANs.

The internet layer packs data into data packets known as IP datagrams, which contain source and destination address information that is used to forward the datagrams between hosts and across networks....

Headers and trailers are the concepts of OSI model. Headers are information structures which identifies the information that follows, such as a block of bytes in communication. Trailer is the informat...