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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
At which OSI layer does data compression take places?
A network consists of multiple computers communicating with one another over a shared network medium. Topology refers to the shape of a network, or the network's layout. In this unit, you have learnt about the various topologies and its structure. The OSI model is a seven-layer model for communications and computer network protocol design. In this unit, you have learnt about the OSI model and the functions of the various layers.
What is a common function of a router?
A router can preform several functions, the most common of which is allowing several systems to share a single connection and IP address
It duplicates the frame to all Ethernet ports, except the port it came from.
A switch's MAC table is built not from destination addresses it receives, but by the source MAC addresses. So the frame is broadcast throughout the broadcast domain, until the end device with a matching MAC address responds to the broadcast, thus giving the switch a new source address to add to its MAC table.
How many processes can listen on a single TCP IP port?
Only one. If there was more than one process listening on the same port, then there would be no way of knowing which process incoming data was intended for. -DJ Craig
How many IP addresses can one find in the header of an IP packet?
There are two forms of IP addresses. the first IPv4, consists of numbers from 0 to 255 in each of four groupings separated by a decimal point. 192.168.1.1 for instance which is used for most routers. So the number of addresses will be 255 x 255 x 255 x 255. This is a 32 bit system and provides enough addresses for the population of Earth (plus or minus) as it was back then, over 4 billion. The second format is IPv6 which is a 128 bit system. It can support 3.4×1038 addresses. More than enough for the foreseeable future. So your answer depends on which IP packet standard you mean.
Who was the lean one in peer gynt?
The "lean one" from Peer Gynt is the Devil (or Satan).
Crossword puzzles often use this clue because "devil" and "satan" both contain five letters - it helps confound well read crossworders!
ABC
Where is your IP address located?
To checkup your IP address:
Command for Windows 2000 / XP / Vista:
Go to Menu Start and select Run. Then, type the following command: cmd /k ipconfig /all
Your IP address will be displayed in an open window after a few seconds.
Command for Windows 95/98:
Go to Menu Start and select Run. Type the following command: winipcfg
Command for Linux:
Type this command in a console as root: ifconfig
in a console as user /sbin/ifconfig
Public IP address:
You can go to the following site: whatismyip
What are the strengths and weaknesses of coax cable?
Strengths: It is a robust, durable and moderately reliable communication method that is easy to crimp, cut, and install quickly and cheaply. It is more durable than TPC and Fiber Optic cables, and can much more easily be weather-proofed for use outdoors. It also acheives greater range than TPC and some Fiber Optic before the signal must be boosted, making it advantageous for rural or long-distance deployment.
Weaknesses: It is larger than some other solutions and more prone to interference, even when shielded, than fiber optic or ASTPC. It is also limited in communication speed due to copper electroresistance and thus cannot move data as quickly as TPC or Fiber Optic methods. It is also a serial communication method, causing extreme data overhead when deployed in networks with many nodes.
It is much more expensive to deploy than TPC when hardware costs are involved, as coaxial modems, splitters and routers are much more expensive (due to increased complexity requirements) than TPC, but is cheaper than Fiber Optic. Coaxial cable also tends to require a translation layer or layers to convert to standard TCP/IP for computers, adding an extra layer of overhead, complexity, and hardware expense.
Coaxial typically has higher latency than TPC over the same distance.
Which device enables computers to be attached to a network without segmenting?
A Hub is the only network device for this type of job.
Since a router stops broadcasts, it segments a network in a way. On the other hand, a switch does forward broadcasts but it creates segments because each switch port can be a network on their own.
Why we cannot connect two PC using straight cable?
actually, we can connect two PCs using straight cable. you can use patch panel (which works as adapter for straight to cross-over cable) or you can use LAN card that supports auto MDIX technology (invented by Hewlett Packard). With auto MDIX any straight cable will work just like any cross-over. further information about auto MDIX: http://en.wikipedia.org/wiki/Auto-MDIX
What is the function of the EIGRP routing protocol on the network layer of the OSI model?
A routing protocol basically allows routers to tell each other about available routes, updating the information regularly. Enough information is provided so that a router can choose between two or more different routes, should such alternative routes exist.
A routing protocol basically allows routers to tell each other about available routes, updating the information regularly. Enough information is provided so that a router can choose between two or more different routes, should such alternative routes exist.
A routing protocol basically allows routers to tell each other about available routes, updating the information regularly. Enough information is provided so that a router can choose between two or more different routes, should such alternative routes exist.
A routing protocol basically allows routers to tell each other about available routes, updating the information regularly. Enough information is provided so that a router can choose between two or more different routes, should such alternative routes exist.
Which layers of the OSI reference model do not have individual protocols associated with it?
Session and Presentation Layers
What is the purpose the Task Manager?
The Task Manager helps you see to watch for running programs and connected users. Also in a case of an unproper working program which you are unable to close through standard methods you can terminate with the Task Manager (right click, End process, or End process tree).
How does a fiber optic cable carry telephone conversations?
We're used to the idea of information travelling in different ways. When we speak into a landline telephone, a wire cable carries the sounds from our voice into a socket in the wall, where another cable takes it to the local telephone exchange. Cellphones work a different way: they send and receive information using invisible radio waves-a technology called wireless because it uses no cables. Fiber optics works a third way. It sends information coded in a beam of light down a glass or plastic pipe. It was originally developed for endoscopes in the 1950s to help doctors see inside the human body without having to cut it open first. In the 1960s, engineers found a way of using the same technology to transmit telephone calls at the speed of light (186,000 miles or 300,000 km per second).
How does TCP ensure reliable data transfer?
There are three features that allow TCP to reliably and accurately track the transmission of data from source to destination. They are flow control, session establishment, and numbering and sequencing.
What is hardware and networking?
Networking hardware typically refers to equipment facilitating the use of a computer network. Typically, this includes routers, switches, hubs, gateways, access points, network interface cards, Networking cables, network bridges, modems, ISDN adapters, firewalls and other related hardware.
The most common kind of networking hardware today is copper-based Ethernet adapters, helped largely by its standard inclusion on most modern computer systems. Wireless networking has become increasingly popular, however, especially for portable and handheld devices.
Other hardware prevalent within computer networking is datacenter equipment (such as file servers, database servers and storage areas), network services (such as DNS, DHCP, email etc) as well as other specific network devices such as content delivery.
Other diverse devices which may be considered Networking hardware include mobile phones, PDAs and even modern coffee machines. As technology grows and IP-based networks are integrated into building infrastructure and household utilities, network hardware becomes an ambiguous statement owing to the increasing number of 'network capable' endpoints.
What is the advantages of Local Area Network to Wide Area Network?
- Files can be stored on a central What_are_the_advantages_of_local_area_network(the file server) allowing data to be shared throughout an organization.
- Files can be backed up more easily when they are all on a central fileserver rather than when they are scattered across a number of independent workstations.
- Networks also allow security to be established, ensuring that the What_are_the_advantages_of_local_area_networkusers may only have access to certain files and applications.
- Software and resources can be centrally managed.
- Network versions of software often allow for their speedy installation on workstations from the What_are_the_advantages_of_local_area_network.
- Expensive devices such as laser printers or scanners can be shared.
- Users can access their files from any workstation
What is the IP address of your machine?
Your IP Address is a set of numbers which defines your specific computer in the world of the internet. Your ip address allows everyone to connect to you, send you information, and vise versa. You wouldn't be able to view this website right now if it werent for the ip address. http://wiki.answers.com, like any website's name is an alternative to it's long and agonizing ip address. Through the ip address of wiki.answers you are able to see this answer.
Are phone and Ethernet cables the same?
Cat 5 is a type or standard of ethernet cable (350 Mhz) and is not as good as the Cat 6 (500+Mhz) which will work wherever you were going to use the Cat 5 ethernet cable and not require replacement as cable/DSL broadband internet speeds increase
What is the error detection technique that can detect errors with only one bit?
(a) simple parity check (b) two-dimensional parity check
(c) crc (d) checksum
