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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 is the millions of computers around the world connected by a network of networks called?
THat answer is simple. It is called the World Wide Web.
How many mac addresses does a router have?
Yes. Some switches have, in any case - I know that the Cisco switches do. A switch needs both a MAC address and an IP address, if it is to be the endpoint of data communication; for example, if you want to test whether you can access the switch with the "ping" command, or if you want to configure it remotely.
How does network help businesses save money?
Simple: increased user productivity. Instead of every employee having to walk to the person in charge of certain data, get the files from them on removable media, and then walk back to his own desk, the network allows files to be shared without any real effort. Changes to a file are also automatically available to everyone on the network, reducing the chance of different people having different versions of the information in question. Plus, a network allows the IT staff and management to more easily monitor what the users are doing on their computers, reducing wasted time (spent playing games, browsing the internet, etc.).
What are the uses of hardware and networking?
If your business has more than one computer, chances are you could benefit from networking them. A local area network (LAN) connects your company's computers, allowing them to share and exchange a variety of information. While one computer can be useful on its own, several networked computers can be much more useful.
Here are some of the ways a computer network can help your business:
- File sharing: Have you ever needed to access a file stored on another computer? A network makes it easy for everyone to access the same file and prevents people from accidentally creating different versions.
- Printer sharing: If you use a computer, chances are you also use a printer. With a network, several computers can share the same printer. Although you might need a more expensive printer to handle the added workload, it's still cheaper to use a network printer than to connect a separate printer to every computer in your office.
- Communication and collaboration: It's hard for people to work together if no one knows what anyone else is doing. A network allows employees to share files, view other people's work, and exchange ideas more efficiently. In a larger office, you can use e-mail and instant messaging tools to communicate quickly and to store messages for future reference.
- Organization: A variety of scheduling software is available that makes it possible to arrange meetings without constantly checking everyone's schedules. This software usually includes other helpful features, such as shared address books and to-do lists.
- Remote access: Having your own network allows greater mobility while maintaining the same level of productivity. With remote access in place, users are able to access the same files, data, and messages even when they're not in the office. This access can even be given to mobile handheld devices.
- Data protection: You should know by now that it's vital to back up your computer data regularly. A network makes it easier to back up all of your company's data on an offsite server, a set of tapes, CDs, or other backup systems. (Of course, another aspect of data protection is data security. In our article, What Is a Firewall? you can read more about how a network can protect the data it transmits.)
Of course, this isn't a complete list; once you have a network, you'll probably find many other uses for it. And once you get used to the benefits of a network, you'll never look at your computer the same way again.
When you're ready to network your computers, one of the first choices you'll encounter is the speed of connection. You might also wonder whether to spring for a wireless LAN. Read about the speed factor in our article, How Fast Does Your Network Need to Be?
A stateful server loses all its volatile state in a crash. * Restore state using a recovery protocol based on a dialog with clients, or abort operations that were underway when the crash occurred. * Server needs to be aware of client failures in order to reclaim space allocated to record the state of crashed client processes (orphan detection and elimination).
Pictures of first to fifth generations of computer?
Pictures of the five generations of computers are not as easy to find as one might think. The best way to find them is to use a search engine and type in "(first, second…one at a time) generation of computers." Though some of the ad pictures at the bottom of the page might be offensive to some, the best pictures found for the first generation are at the Related Link. The second generation brought us computers very much like the PCs we have today, and from that point, the main progress was made with internal changes, though other changes, like LCD monitors, laptops, cell phones, etc. came about, too. Pictures of each generation can be found on websites linked at the Related Links.
What is difference between Transport layer and data link layer?
The data link layer handles communication between systems on the same local network. The network layer handles communication between systems on different local networks and allows those packets to be routed between the two.
The data link layer would allow two machine on network a to talk to each other or two machines on network b to talk to each other. This communication takes place using the physical/MAC addresses of the machines.
The network layer is what allows a machine on network a to talk to a machine on network b using logical address like IP addresses.
What services are offered by Bright House Network?
Bright House Networks offers digital TV, high speed internet, and home phone services. They also offer solutions for business customers. Bright House Networks serves over 2.4 million customers.
Why wont your cell phone send texts?
There can be many reasons. Here are some troubleshooting steps: # Turn the phone off and take the battery out.
# Make sure there is no physical or water damage to the battery. # Insert the battery back in carefully.
# Turn on the phone and check the battery strength and signal strength.
# Send a message to your own phone number. If you receive the message, it works. Other possible problems:
In some Blackberry models, your "wireless" must be turned on.
If you sent a message to yourself and that works but you are still having the problems, your T mobile phone may only be able to receive messages from T mobile. This problem is rare and usually related to network issues w/i T mobile.
What Asynchronous voice band modems?
Synchronous modems operates in the audio domain, at rates up to 28800 bps in audio lines, used in telephones systems (using synchronous data). The usual modulation methods are the phase modulation and integrated phase and amplitude (at higher rates than 4800 bps).
In synchronous modems, equalizers are used, in order to offset the misfit of the telephone lines. These equalizers are inserted in addition to the equalizers, that sometimes already exist in the telephone lines.
These equalizers can be classified into three main groups:
- Fixed/statistical equalizer - these equalizers offset the signal according to the average of the known attenuation in each frequency. Tuning the equalizer is sometimes done in the factory and stays fixed, usually they are used to operate at low rates in a dial up line.
- Manually adjusted equalizer - these equalizers can be tuned to optimal performance to a given line. These equalizers should be re-tuned when the line is replaced and periodically. Specially, it should be tuned frequently when the line is of a low quality and it's parameters are changed frequently. Tuning is done using a button inside the modem (or on the external board).
- Automatic equalizer - these equalizers are tuned automatically when the connection is established. Depending on the line quality in a specific moment, in a process of about 15ms to 25ms, after the first tuning, the equalizer samples the line continually and adjusts itself to the changed conditions, so the modem operates at each moment under optimal conditions. The fitness process operates, in some modems, at rates of 2400 times in a second.
Synchronous modems operate in the same manner asynchronous modems. However, synchronous modems operates at higher rates and since the requirements to transmit at these rates is increasing, most of the innovations are implemented for synchronous modems.
In synchronous modems the channel can be split for several consumers at various speeds. Modems who have this ability are called SSM - Split System Modem. These modems can use a simple split or a split using multipoint connection.
Synchronous data is accompanied by a clock signal. Synchronous data is almost always grouped in blocks, and it is the responsibility of the data source to assemble those blocks with framing codes and any extra bits needed for error detecting and/or correcting according to one of many different protocols (BISYNC, SDLC, HDLC, etc.). The data source and destination expect the modem to be transparent to this type of data, conversely, the modem can ignore the blocking of the data.
STP
Where can you find a free proxy server that will allow you to post anonymously?
It is easy to find proxy lists cited on other websites and forums. Typically, you can find various websites that give you access. Also, if you have any concerns regarding anonymity, you can find out whether these sites are indeed anonymous and can protect your identity.
Go to start then run. Here you will either need to type in command and press enter. Once you do this you should see the command screen. Once you are here type in ipconfig and press enter, you should see the default gateway address there after pressing enter. Hope this helps! From Ryan @ Edutech Plus
What are the three types of network security?
There are about 30 types of network security, described at the related link.
These including using firewalls, anti-virus software, encryption, using static IP addresses, using Virtual Private Network, etc.
How do you hack wifi network by mobile?
Hacking is illegal - we in the Wiki community will not help you break the law !
What are two reason using layer protocols?
- A layered protocol architecture provides a conceptual framework for dividing the complex task of exchanging information between remote hosts into simpler tasks.
- Each protocol layer has a narrowly defined responsibility.
- A protocol layer provides a standard interface to the next higher protocol layer.
- Consequently, it hides the details of the underlying physical network infrastructure.
- Benefit: The same user-level (application) program can be used over very diverse communication networks.
- Example: The same WWW browser can be used when you are connected to the internet via a LAN or a dial-up line.
The INTERNET is a collection of networks in the network infrastructure. Millions of computer are connected with each other with help of Internet. We can share data, view animations, stay connected and much more only if both sides of the PC have access to Internet.
The World Wide Web is the only information accessible over the Internet through one and only medium knows as HTTP Text Transfer Protocol). It is one of the most top model in the Web.
Both can be given the best example Internet is a restaurant and Web is considered as most popular dish in the menu.
Which subnet would include the address 192.168.1.96 as a usable host address?
typically the router that you are using will take 192.168.1.1. It is a usable address, but it is already taken, so the first IP you can use for a device on that network would be 192.168.1.2
the last usable IP is 192.168.1.254 assuming you are using a subnet mask of 255.255.255.0
Keep in mind that if you are giving devices static IP addresses, it is recommended to reserve the IP address in the DHCP server (typically the router in a home network) or assign it outside of the scope of ip addresses. You can do this through the configuration of the router, typically by entering the router's ip into your browser. (make sure you set your wireless settings to wpa otherwise you will have little or no security)
What is the name of the protocol that windows network rely on for their file sharing?
The Windows file sharing protocol is the Server Message Block or SMB. It was developed by Barry Feigenbaum at IBM.
Why is layer three addressing hierarchical?
Layer 3 addressing is hierarchical because it allows the division of networks into subnets. For example, one route entry can refer to a large general network and another can refer to a subnet of that same network. When forwarding a packet, the router will select the most specific route that it knows. However, if a specific subnet is not in the routing table but the larger network that holds the subnet is known, then the router will send it to the larger network, trusting that another router will find the subnet.
How many subnets can you have in a class C network with a 26 bit mask?
A Class C IP address has 24 bits for network and 8 bits for host. So to have a subnet mask of 26 bits, you will need to use 2 bits from host part.
Number of subnets is given by the formula : 2^(no. of bits used from host part).
Hence number of subnets in this case would be = 2^2 = 4.
For e.g. if the class C IP address is 200.168.210.0
the 4 subnet addresses would be :
11001000.10101000.11010010.00000000 = 200.168.210.0
11001000.10101000.11010010.01000000 = 200.168.210.64
11001000.10101000.11010010.10000000 = 200.168.210.128
11001000.10101000.11010010.11000000 = 200.168.210.192
Note: The digits in bold are the mask bits.
What are good brands of wired routers?
"One router that has an average rating of 4.5 stars with over 6,500 reviews is the TP-Link Cable/DSL Wired Router. Another brand that is well known and gets good reviews is Linksys. D-Link also has high marks and is a brand that has a track record for quality."
Provides a moible user with a secure connection to the company network server?
VPN (virtual private network)
