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What is passive topology?
When the computers on the network simply listen and receive the signal, they are referred to as passive because they don’t amplify the signal in any way. Example for passive topology - linear bus.
Crsna Suneel
- May 19th, 2009
When the computers on the network simply listen and receive the signal, they are referred to as passive because they don't amplify the signal in any way. Example for passive topology - linear bus.
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What are the important topologies for networks?
BUS topology:In this each computer is directly connected to primary network cable in a single line.Advantages:Inexpensive, easy to install, simple to understand, easy to extend.STAR topology:In this all computers are connected using a central hub.Advantages:Can be inexpensive, easy to install and reconfigure and easy to trouble shoot physical problems.RING topology:In this all computers are connected...
Crsna Suneel
- May 19th, 2009
There are five topologies for networks 1. Ring Topology 2. Star Topology. 3. Bus Topology. 4. Mess Topology. 5. Hybrid Topology.Now a days we are using EXTENDED STAR topology. It is fast & reliable topology.
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Cable Length
Why do we have a minimum and maximum cable length requirement
badariprasad
- Jun 5th, 2009
The min and max cable length is required because the signals can travel effectively without loosing their strength to that extent you can increase the cable length apart from preferred by using the repeaters after the length so that the signals will be boosted again.
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TCP IP Integration
TCP is reliable in communication whereas IP is Non-reliable. Why it is integrated into one and given as TCP/IP protocol?
sudhavijay
- Jun 17th, 2009
Reliability not achieved at lower layers shall be implemented at the higher layers and more importantly each Layer in TCP/IP protocol suite is responsible for some network operations. IP though unrel...
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Access a File on Another Computer
A person would like to access a file on another computer (connected via LAN) while working with safe mode. What should he do?
jethin
- Jun 22nd, 2009
In safemode itself he can use telnet to access file on the other system in the same LAN
sashok_001
- Aug 23rd, 2008
The User has to restart the PC and Getting into the Safe mode with networking
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What is VPN? Is RAS and VPN one and the same?How do I determine that My computer is part of correct network and is getting a Valid IP?
aarsh
- Jun 24th, 2009
SD RAM:SDRAM is Single Data Rate meaning that SDRAM can accept one command and transfer one word of data per clock cycle. Typical speeds of SDRAM are 100 and 133 MHz.DDR SDRAM:DDR SDRAM transfers data...
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VLAN and INTERVLAN
What is VLAN and INTERVLAN? Why do we use these techniques?What are the differences between STP, RSTP and MSTP?
mllhzaheer
- Jul 9th, 2009
VLAN are used to segment your network eliminate broadcast it is also used for security purpose.VLAN of sales department cannot access VLAN of finance department.InterVLANs are used to create VLAN to VLANs.
gurbirks
- Nov 28th, 2008
VLAN(Virtual Local Area Network) is a logical grouping of network users and resources connected to administratively defined ports on a switch. VLAN's break up broadcast domains in layer 2 switch n...
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WAP Gateway
What is the function of a WAP gateway ? Discuss WAP protocols.
goutham431
- Nov 13th, 2009
Implementation of the WAP stack Converting protocols Converting markup languages Compiling WMLScript programs Encoding WML into a binary bitstream Providing access control Caching Domain name resolution services (DNS) Security features
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What is the subnet mask of this network
if interface address is 130.237.14.25/23- what is the subnet mask of this network- how many usable IP address in this network- what is the Subnet ID(IP) of this network- what is broadcast IP of this network
saeedkhan
- Nov 20th, 2009
The Default subnet mask for this Ip address is 255.255.254.254 as this is class B IP address. But the the subnet mask is 255.255.254.128/23.Since, ...
dilipmohapatra
- Oct 4th, 2007
Subnet Mask: 255.255.254.0No. of IP addresses assigned in that subnet: 2^9 -2=510Subnet ID: 130.237.14.0/23Broadcast ID: 130.237.15.255
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What is the process of OSI Model, when two computer communicate with each other?
akaliappa
- Feb 1st, 2010
OSI model could be big. I will explain it in TCP/IP model, which is used in modern computersThe TCP/IP model has the following Layers.ApplicationTransportNetworkData LinkPhysicalApplication:When 2 PCs...
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Communicating
When two network layers are in communication with one another, these layers are known as?a.)PDUsb.)peer entiiesc.)PRAMsd.)sockets
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Token Ring Segment
You need to connect a Token Ring segment to an Ethernet segment. Would you use a router, a brouter , or a bridge ?
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Network Negotiation
What does negotiation mean when discussing network protocols?
vijaykwt
- Apr 20th, 2010
The Difference Between Half and Full Duplex."Duplex" simply means you're able to send and receive data (most often the human voice) from the same device whether that be with your phone, 2-wa...
zeeshanexpert
- Mar 30th, 2010
Negotiation has to do with getting both sides to agree on some parameters or values to be used during the communication. Maximum packet size is one example, but there are many others.
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Missing NTLDR File
Windows crashed because NTLDR File is missing. How will you restore this file (Without using Safe Mode Option)?
kamalakar2000
- Jul 23rd, 2010
Step 1Locate your windows xp/2000 install disk and place it in your CD/DVD ROM drive. If you do not have this disk then you cannot proceed any further.Step 2Restart your computer or turn it off then b...
kumadine
- Dec 18th, 2009
Insert CD in CD-Drive then boot system from CDCopy ntldr file from CD and paste this file to C: drive corresponding folder and then restart this system
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Read a Switch
You are given only the IP address of the switch but not the port number. How will you read that switch?
sonet
- Aug 4th, 2010
If the switch has an Ip address, you telnet to the switch and provided that there is no password set either at virtual terminals or to enter the privileged mode, you can enter privileged mode and write sh run and read the running config.
sonet
- Aug 4th, 2010
A switch can have an Ip address for telnetting purpose.So, if you telnet to the switch, and if you have no password on Telnet you can access the switch (provided that there is no privileged mode password set) and then 'Show Run' , you can read the running configuration.
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Which protocol is used for retrieving mails?
artesantosh
- Oct 11th, 2008
POP protocol (port number 110) used for retriving mail in micosoft outlook.
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Connect and Configure
There are four routhers and 4 swiches and 40 computers in an office. How will you connect each devices and configure those devices?
haisudha123
- Oct 13th, 2010
This is using different network build purpose, so connect first router to first switch and connect 10 nodes with first switch, this is one network ex:192.168.1.0 networkand connect second router...
nawin_54
- May 12th, 2010
Ahmed, based on requirement we connect the networks, you didn't mention the series of switches and routers.
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How Gateway is different from Routers?
A gateway operates at the upper levels of the OSI model and translates information between two completely different network architectures or data formats.
Piyush Verma
- Nov 3rd, 2010
Router is only used to transfer a packet from one network to another but if protocols of both side networks are diffrent then Getway is used to translating protocols.Ex: WAN to LAN
nandanmehta
- Jan 4th, 2010
Gateway is nothing but the final point that the data crosses finally in a network,it is mostly used for user authentication which router cannot provide.Gateways can provide authentication to ano...
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VPN Network Protocols
Benefits of VPN ? Difference between L2TP and PPTP Protocols
vishnurajr
- Dec 15th, 2010
A Virtual Private network (VPN) allows the creation of private networks
across the internet, enabling privacy and tunneling of non-TCP/IP protocols.
Three different categories of VPNs:
They are Remote access VPNs, Site -to-site VPNs, Extranet VPNs.
VISHNU RAJ.R
prasanna168
- Dec 13th, 2007
A Virtual Private Network ( VPN) delivers private network services over a public infrastructure. An IP VPN is a partitioned private network constructed over a shared IP-based backbone that utili...
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how do you use VPN to connect branch office to the other office ?
bangers
- Dec 21st, 2010
There is no one answer for this very broad question. You can use Microsoft IAS, Cisco, Juniper, etc. Basically you need to use a routing protocol of some sort to connect the two offices. This would ty...
ah.alqahtani
- May 24th, 2010
You have to download "Cisco Systems VPN Client" program, and also to get the .pcf file, which must contains the host IP and your username.... I hope that I gave you the key for your answer.
Computer Networks Interview Questions
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