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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
Convergence
Packet InterNet Grouper (Groper)" (sometimes also defined as "Packet Inter-Network Groper). The usefulness of ping in assisting the "diagnosis" of Internet connectivity issues was impaired from late in 2003, when a number of Internet Service Providers filtered out ICMP Type 8 (echo request) messages at their network boundaries. This was partly due to the increasing use of ping for target reconnaissance, for example by Internet worms such as Welchia that flood the Internet with ping requests in order to locate new hosts to infect. Not only did the availability of ping responses leak information to an attacker, it added to the overall load on networks, causing problems for routers across the Internet.
Ping is a computer network utility program that allow verification of an IP address' existence over the network or the internet.
Tcp ip and netbeui which is not routable?
IPX/SPX : Routable // TCP/IP : Routable // NetBEUI : Not Routable
Explain what a firewall is and why it is necessary?
a fire wall is a something that protects your computer from viruses and popups A mechanism that isolates a network from the rest of the Internet, permitting only specific traffic to pass in and out. firewall is a hardware or software solution to enforce security policies. In the physical security analogy,
What is the use and need of protocols in computer net work?
Network Protocol are needed because the message or data send by our network have to reached on destination through different networks of different structure and different platform. so network protocols are performing to duty to make our sended data compatible to that new networks, which come in the way to destination.
Muhammad Qasim Mughal
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What is the position of the transmission media in the OSI model or the internet model?
it comes in the first layer, or popularly known as the physical layer. must not be confused to be in datalink layer.
What are strengths and weaknesses of Systems Development Life Cycle?
SDLC is more like a" waterfall" methodology, you have to of completed one task b4 you continue to the next task, one major weakness of SDLC is that the user is unable to present feedback until the full project is completed.
Why routing is required in wireless sensor networks?
Since, wireless sensor networks (WSNs) might differ depending on the application and network architecture. Moreover, nodes are dynamically deployed. Hence, data transmission through these types of nodes need a perfect route selection where nodes should remain active. So, routing is necessary for WSN.
This is known as routing.
Where can one look up an IP address?
two ways of doing that
1 if internet is availabe then goto whatismyipaddress.com.
2 go to command prompt and give command ipconfig in windows and ifconfig in Linux on shell interpreter
The Differentiated Services Field.
In which layer of the TCPIP Model do routers belong?
In the TCP IP model, routers belong in layer 3. This is a common model used in setting up information technology systems.
Blank ethernet operates at 100 mbps and uses stp or utp cabling rated cat-5 or higher?
False. It uses a coaxial cable and an AUI connector.
Can people see what you send over secured wireless network?
There is no easy answer: It depends. If you are worried about the safety of your information, do not type in sensitive information (such as credit card numbers, bank passwords, etc.) on an unsecured network. Unsecured networks are the ones that do not require a password, and anyone can get access to them. Most secure wireless networks feature some type of encryption, which makes it harder for hackers to get hold of your information. Currently, the best encryption is WPA2. You can check the type of encryption you are using by going into your connection properties. Upgrading to WPA2 may require a new router or wireless adapter. Keep in mind that just because you are using a secure network with WPA2 encryption at home doesn't mean everyone else is--try not to enter private information on public networks. No wireless network is completely safe, but the best ones are pretty close. Also, if your are concerned about safety and privacy, you should purchase a good security suite to prevent hackers from gainng access to your computer--and your information.
Which layer is done by congestion control?
at the network layer, congestion control mechanism takes place
My IP address disappeared after the Norton tech tried to fixed my antivirus. Now he says I have to have that fixed (which it worked before he came online) before the virus protector can be fixed. So, how do I restore my IP address.
How does one use an access control system?
Access control is more and more of a concern for many as privacy invasion becomes more commonplace. Logically, the first step toward protecting privacy is governing access to your personal space. As the need has risen, so have the companies who claim to have the right system for you. With security systems, one size never fits all. Before going out and buying the wrong system for your particular application, do some access control system research.
Do a personal access inventory. Identify and evaluate access vulnerabilities, and the best way to shore up access protection of these areas of exposure. Establish perimeters and review options for securing them.
Set your security perimeter.
Decide on the level of access control that is needed and what you are comfortable with. Think about and check out the available technologies for the system you have in mind. Make your list of who will share access, and who will be excluded.
Make sure that each person on your access list agrees, and is willing to keep his access information confidential. Instruct them not to share it with friends or others who are "harmless." Restriction of access is, after all, the whole idea behind a control system.
Do not trust your security to newcomers.
Shop your access system requirements. Meet with and speak to three or four well-established, trusted companies in your area about what you want. Schedule a time for them to do an on-site estimate. Be present for that on-site evaluation; do not leave it to someone else.
Narrow down your system company prospects to two; then, carefully re-evaluate what each offers. Compare pricing versus what the package presented really offers. Check out their work by asking for and visiting at least two of their current customers.
Quickly resolve any doubts you may have about your new system.
Re-evaluate one final time on your way to your final decision, after making your site visits. Look specifically for the best reliability of the system. Consider next the convenience and level of comfort you personally feel about each system you are considering. Review how the system works, and assess your degree of confidence with it.
Do not buy a system that you feel is too complicated to operate. Do not buy a system you do not have complete protection confidence in, and do not buy a system that is too pricey for what it offers.
What is a telecommunications network protocol?
is the set of standard rules for data representation, signaling, authentication and error detection required to send information over a communications channel
What are the uses of a social networking site?
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Can you use a pre N wireless card with a N wireless router?
Yes. Wireless N routers are backward-compatible with wireless G cards. You will not get the performance benefits of N though.
