0
Computer Networking
Computer networks are collections of computers which are connected together in order to communicate and transfer information. Questions about computer networks, networking protocols, and how to set them up belong here.
18,810 Questions
Why is it that an ICMP packet does not have source and destination port?
Because ICMP is on the network layer
What is connectionless-iterative server?
In connectionless server there is no need of establishment of connection with other party. Iterative server means server is handling the requests from different clients but one at a time. Server does not pay any attention to other clients while it is processing one client. Other requests are kept in queue waiting for their turn.
Connectionless Iterative ServerThe servers that use UDP are normally iterative, which means that the server processes one request at a time. A server gets the request received in a datagram from UDP, processes the request, and gives the response to UDP to send to the client. The server pays no attention to the other datagrams. These datagrams are stored in a queue, waiting for service. They could all be from one client or from many clients. In either case they are processed one by one in order ofarrival.
The server uses one single port for this purpose, the well-known port. All the datagrams arriving at this port wait in line to be served.
Generally the services provided by these iterative servers are one which takes very short time execute. Example service is the Internet Daytime service, which returns the time and the date.
Which fields of the IPv4 header change from router to router and why they change?
IP address remains the same. Mac address changes from router to router.
What are minimum parts needed to build a networked computer?
A motherboard with an ethernet port, a hard drive (with installed OS), processor, graphics processor, monitor, keyboard+mouse. Oh and a case to put the stuff in.
How many 64kps channels are used for ISDN BRI?
IDSN BRI, also known as a Two-B-plus-D provides:
2 x 64KBps B channels
1 x 16 KBps D Channel.
IDSN PRI (Primary Rate Interface) in North America provides:
23 x 64 Kbps B Channels
1 x 64 Kbps D Channel
IDSN PRI in Europe provides:
30 x 64 Kbps B Channels
1 x 64 Kbps D Channel
Single bit error in data transmission?
A single bit error is when only one bit within a given data string is in error.
It affects only one character within a message
What would happen if you disable dns lookup in a production environment?
incorrect command will not be automatically resolved
What is the valid ip address with network number 190.254.0.0 using 11 bits?
This assumes you know how to subnet. On a network with 190.254.0.0 as a host address and using 11 bits for the subnet mask. The network address is 190.224.0.0 and the end of the range is 190.255.255.224. The address you show is within this range so cannot be the network address. If you don't know how to work this out manually use a subnet calculator such as the one on this URL: http://www.boson.com/FreeUtilities.html
What are the Different types of data transfer instructions?
1.simple i/o:
2.programmed i/o:
a) synchronous data transfer
b) asynchronous data transfer
c) interrupt driven data transfer
3.Direct memory access data transfer
a) burst mode
b) cycle stealing mode
What is the difference between monster mesh and six diamond mesh?
There is no difference. They are the same thing. Although there are 4 different types of monster mesh them being mega mesh (5 diamond), monster mesh (6 diamond), 7, and eight diamond monster mesh. The entire company is called monster mesh but when people say monster mesh they normally mean 6 diamond. :)
How much money does it cos to get The MCSE and CCNA?
To earn MCSE, you have to give 7 exams and each MCSE exams costs USD$50. CCNA has only 1 exam(composite), which cost USD$250. If you dnt want to take composite exam and want to take single exam then it wud cost you USD$125.
Should you leave your modem connected when not in use?
Some people prefer to disconnect the phone line from their modem when it is not in use. There is something to be said for this practice, as in rural areas it is not uncommon for surges to come over the phone line and zap the modem.
However, this risk can be mitigated by using a quality surge suppressor, most of which come with a phone line protection circuit which is easy to use. This, coupled with the difficulty of reaching the plug, as its on the back of most peoples computers, means that its not reasonably practical or necessary for most people to disconnect and reconnect the modem that often. Additionally since modems are so inexpensive and are so easy to replace, i wouldn't bother.
How do you test your ip is dynamic or static?
A static Ip is usually issued by your computer under the Internet protocol. A Dynamic Ip is usually issued to a computer under the DHCP protocol (Dynamic Host Computer Protocol) that doesn't already have a static Ip. you can find your Ip and its relevance by doing the following: 1: In Vista click the windows Icon/ In Xp press the windows button on keyboard 2: In the search colum type 'command prompt' - this will start a new BLACK oblong box where it will enter DOS (disk operating system) command sequence. 3: Once at this point type in: ipconfig - this will fetch all the details concerned with your Ip (internet protocol) address. Hey presto you now know which Ip you have (dynamic or static) Hope that helps you.
according to cisco
Networks are systems that are formed by links. Websites that allow individuals to link to each other's pages are called social networking sites.
What is unrestricted simplex protocol?
