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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
What type of data transmission occurs in a computer bus?
A digital data transmission occurs in a computer bus. The data are in the form of electromagnetic signal, such as an electrical voltage, microwave, radiowave, or infrared signal.
What is purpose of the routing protocol?
According to CCNA Discovery 02 - Chapter 6
It Allows a router to share information about known networks with other routers.
Do different services of the internet feature different transfer protocols?
Yes. Three examples are:
- HTTP - HyperText Transfer Protocol (used to transfer web pages)
- FTP - File Transfer Protocol (as it says)
- SMTP - Simple Mail Transfer Protocol (supports some functions of the email system)
These are all service layer protocols. Underpinning these are transport layer protocols, principally
- TCP - Transport Control Protocol (used for most services)
- UDP - User Datagram Protocol (used for services and internal internet mechanisms that favor unimpeded delivery over assurance, order, and/or control of data flow)
There are layers of protocol below this; the immediate one is the internetwork layer, which allows the higher layers to work seamlessly over multiple interconnected network media such as WiFi, Ethernet, optical fiber, etc. Below that are the protocols that correspond to the specific media.
Why is it necessary to clear the cache before you retest the web server connections?
Clearing the cache is important to ensure that you do not access a locally stored representation of the web site, which may be down when you first access it and may be currently active, however it displays the cached version of the connection.
Is It possible to prioritize connectivity to a specific device with wireless router?
Yes. In most modern routers there are ways to do this. However.. This differs in all brands and types of routers. You can start by going true the manual of the device you own. You should start looking at QoS or something in that vicinity.
It can be done by mac id or ip. Its more common to give certain protocols a higher bandwidth allocation.
Regards,
tesseract
It could refer to the 1/2" Semi Rigid Coax cable that Ferranti once used for their "Broadband" Local Area Network systems that got installed in some office building and in manufacturing environments during the early 80s. This cable is also known as CATV (of USA origins?). If my memory serves me correctly, there was an armoured version of the cable.
I used to work for a large Insurance Company in South East London that had one of these Ferranti Cabling systems installed. I was trained by Ferranti on its theory of operation, installation and termination.
Which protocol is used to set the IP address?
The older protocol for this purpose was BOOTP, but modern addressing LAN schemes today will use DHCP.
Some adapters require you to predefine settings for such networks including security network phrase, name of the network, type of connection type of security and so on.
What is the best network for colocation?
Convenience of access to the colocation (network) provider is crucial in terms of server storage etc. The best network for a company depends on data volume for storage and efficient speed of processing, requiring adequate broadband width. A useful starting point is "The Colocation Service Provider Directory" which offers a list of worldwide facilities and useful links for tailor-made services.
Where can one find a home hub?
Home hub routers can be purchased from many electronic stores and retailers. Examples of websites and stores that sell this product include eBay, Best Buy, and Amazon.
What are some useful open source network management tools?
It really depends on what you're trying to accomplish with the programs you download. However the Just For Fun Network Management System is a pretty good program. One or Zero AIMS is another great program featuring it's own help desk and knowledge base.
Each individual organization who want to secure credit card transactions, online login system, web forms, web mail, control panel or the protected area of the website. SSL certificate can secure file transfer over https and FTP services, e-mail connections between Microsoft Outlook and Microsoft Exchange and intranet-based traffic such as intranets, extranets and database connection
SSL certificate to secure the connection online!
Why does unplugging and then reconnecting your LAN to your DSL modem make the internet respond?
This happens because it clears the Line, Reboots the lan connection and give you a good IP address.
What is the communication is the virtual communication of two OSI layers on different machines?
NETWORK LAYER
What are the business benefits and management challenges of clientserver networks?
Establishing the right kind of network for your organization is important to make the most of your time and money. While peer-to-peer network is often a good choice for small networks, in an environment with more than 10-15 computers, a peer-to-peer network begins to become more trouble than it is worth: your computers start to slow down, you can never find the file you are looking for, and security is non-existent. If this is happening in your organization, it is probably time to switch to a client-server network by bringing in a dedicated server to handle the load. The server is called "dedicated" because it is optimized to serve requests from the "client" computers quickly. The diagram below shows a simple client-server network: A server is simply a computer that is running software that enables it to serve specific requests from other computers, called "clients." For example, you can set up a file server that becomes a central storage place for your network, a print server that takes in print jobs and ships them off to a printer, as well as a multitude of other servers and server functions (see article Networking 101: Server Applications ). A server provides many benefits including: ; Optimization: : server hardware is designed to serve requests from clients quickly ; Centralization: : files are in one location for easy administration ; Security: : multiple levels of permissions can prevent users from doing damage to files ; Redundancy and Back-up: : data can be stored in redundant ways making for quick restore in case of problems
Discuss about the difference between go-back-n ARQ and Selective Repeat ARQ?
Go-Back-N ARQ
- Retransmission begins with the last unacknowledged frame even if subsequent frames have arrived correctly .duplicate frames are discarded.
- Go-back-n ARQ -- Receiver must get Frames in correct order
Selective Repeat ARQ
- Only the unacknowledged frame is retransmitted.
- It may be (slightly) more efficient than Go-back-n ARQ, but also much more complicated.
- Selective repeat ARQ -- correctly-received out-of-order Frames are stored at Receiver until they can be re-assembled into correct order
Hamida Almangush
Does google have aprogram to show houses if address is entered?
Yes, it is called Google Earth. An online version is available called Google Maps.
