Computer Networks Interview Questions
Along any transmission path from a given source to a given destination, a group of virtual circuits can be grouped together into what is called path.
Default port no. For telnet ___ ? snmp ____? ftp ____?
TELNET - 23
FTP - 21
SNMP - 41
telnet- 229
FTP- 21
SNMP- 29
In a ethernet network, between any two points on the network, there can be no more than five network segments or four repeaters, and of those five segments only three of segments can be populated.
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 a message to a group is called multicasting, and its routing algorithm is called multicast routing.
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.
It is a system that performs a protocol translation between different electronic mail delivery protocols.
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 ...
What is gateway-to-gateway protocol?
It is a protocol formerly used to exchange routing information between internet core routers.
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.
What is igp (interior gateway protocol)?
It is any routing protocol used within an autonomous system.
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.
Virtual channel is normally a connection from one source to one destination, although multicast connections are also permitted. The other name for virtual channel is virtual circuit.
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 emulation, in which layer it comes?
Telnet is also called as terminal emulation. It belongs to application layer.
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...
The process that allows a network to self-repair networks problems. The stations on the network notify the other stations on the ring when they are not receiving the transmissions. Beaconing is used in token ring and fddi networks.
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...
How do you perform subnet 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...
The network address made available to the transport layer should use a uniform numbering plan
1. In a session 2. In a lan3. In a wan 4. Across lan and wan
Across LANs and WANs.
What services does the internet layer provide?
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....
What are headers and trailers? How are they added and removed?
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...
What are the types of transmission media?
Signals are usually transmitted over some transmission media that are broadly classified in to two categories.Guided media:these are those that provide a conduit from one device to another that include twisted-pair, coaxial cable and fiber-optic cable. A signal traveling along any of these media is directed...
What are the thre (3) types of transmission media? List out their advantages and distadvantages
Types of transmission media's are:
1) Bounded media
2) Unbounded media
Examples of transmission media.
1) Twisted pair, coax, fiber.
What is system recovery and system failure ?
System recovery is a process of an overall plan for system recovery so that we are prepared if the system fails. System recovery is a tow part system,including system recovery backup and system recove...
using a single IP address and locally splitting it up so that this single network IP address can actually be used on several interconnected local networks is known as netted IP.
If you are given the ip address can u tell how many computers can be connected?What do you look at?
1 ip address belong to 1 system only becz each and every system should know there own ip to communicate and transfer the data if u give same ip to more than 1 system it will throw u error.
For Example in Class AIf IP address is 1.0.0.1 then Network bits is 8 bits and hosts bits are 24bits by calculating by formula 2n-2 (2power)Their fore for 1.0.0.1 the no computers can be connected 1,67,77,214
What is the default subnet mask for an ipv6 address ?
IPV6 do not use subnetting bcoz it have enough IP.
IPV6 cannot subnet so there is no mask
What is the difference between domain & workgroup?
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.
Domain Name Service
User Panel
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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...