Networking Interview Questions

Computer Networking Interview QuestionsDefine VOIP Communication Technology
Here are the basic interview questions for the networkVOIP stands for Voice over IP and this technology is
administrators, system administrators and IT managerused for transmitted the voice over the IP based long
posts. These questions provide the basic informationdistance network to make phone calls. VOIP phone
about the network communication technology, networkcalls are very cheap and a large number of the
topologies, network troubleshooting techniques,corporate offices and home users are using VOIP
network devices and the basic overview of the LANtechnology to make long distance phone calls.
WAN communication model.What is Wi Max Technology?
What is DHCP?Wi Max is a wireless broadband technology and it is a
DHCP stands for Dynamic Host Configurationadvance shape of the Wi Fi (which was a base band
Technology. The basic purpose of the DHCP is totechnology). Wi Max supports data, video and audio
assign the IP addresses and the other networkcommunication at the same time at a very high speed
configuration such as DNS, Gateway and otherup to 70 Mbps.
network settings to the client computers. DHCPDefine Network Gateway
reduces the administrative task of manually assigningNetwork Gateway can be software or a hardware. A
the IP addresses to the large number of thegateway is usually a joining point in a network i.e. it
computers in a network.connects two networks. A computer with two LAN
What is DNS and how it works?cards can act as a gateway.
DNS stands for Domain name system and it translatesWhat is a Router?
(converts) the host name into the IP address and IPA router routes the traffic to its destination based on
address into to the host name. Every domain and thethe source and destination IP addresses, which are
computer on the internet is assigned a unique IPplaced in the routing software known as routing table.
address. The communication on the internet and in theHow Fiber Optic Cable Works
network is based on the IP addresses. IP addressesFiber optics provides the fastest communication
are in this format 10.1.1.100, 220.12.1.22.3, 1.1.1.1 etc. IPmedium for data and voice. Data can travel at the
addresses can't be remembered but the host namesspeed of light through the fiber optic cables. ISPs and
(e.g. xyz.com, abc.com) are easy to remember insteadcorporate offices are usually connected with each
of their IP addresses.other with the fiber optic cables to provide high speed
What is a Firewall?connectivity.
Firewall is a protective boundary for a network and itWhat is File Server?
prevents the unauthorized access to a network. MostA file server is a computer in a network that
of the Windows operating system such as Windowsauthenticates the user access in a network such as
XP Professional has built-in firewall utilities. There areWindows 2000/2003 Servers.
the large number of the third party firewall softwareDefine Seven Layers of OSI Model
and the basic purpose of all the firewall software andThere are seven layers of the OSI model. The basic
hardware is same i.e. to block the unauthorized userpurpose of these layers is to understand the
access to a network.communication system and data transmission steps.
What is WAN?The seven layers are Application, Presentation,
WAN stands for wide area network and it covers theSession, Transport, Network, Data Link and Physical.
broader geographical area. Basically there are threeYou can remember the name of these layers by this
types of a computer network LAN (Local Areaphrase. "All people seems to need data processing".
Network), MAN (Metropolitan Area Network) andDefine GSM Technology
WAN (Wide Area Network). The communication in aGSM is a short range wireless technology and is
WAN is based on the Routers. A WAN network canusually used in the mobile phones, hand help devices,
cover a city, country or continents.MP3 players, Laptops, computers and in cars.