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Local Area Network
Questions concerning the setting up, troubleshooting and operation of wired LANs used by businesses and other organizations
4,003 Questions
Advantages and disadvantages of lan and wan?
Advantages Of WAN
- Covers a large geographical area so long distance businesses can connect on the one network
- Shares software and resources with connecting workstations
- Messages can be sent very quickly to anyone else on the network. These messages can have pictures, sounds, or data included with them (called attachments).
- Expensive things (such as printers or phone lines to the internet) can be shared by all the computers on the network without having to buy a different peripheral for each computer.
- Everyone on the network can use the same data. This avoids problems where some users may have older information than others.
- Share information/files over a larger area
- large network cover
Disadvantages Of WAN
- Are expensive and generally slow
- Need a good firewall to restrict outsiders from entering and disrupting the network
- Setting up a network can be an expensive and complicated experience. The bigger the network the more expensive it is.
- Security is a real issue when many different people have the ability to use information from other computers. Protection against hackers and viruses adds more complexity and expense.
- Once set up, maintaining a network is a full-time job which requires network supervisors and technicians to be employed.
- Information may not meet local needs or interests
- Vulnerable to hackers or other outside threats
What do switches do in the home network?
You can use a switch to connect different pieces of equipment. For example, a standard ADSL router only has a port for a single Ethernet cable. If you want to connect 2 or more computers to the Internet, you can use a switch. In this case, the ADSL router and each computer connect to the switch, via a standard Ethernet cable.
If you don't have an Internet connection, you can still set up a home network to share files, etc. To connect only 2 computers, you can connect them directly via a crossover cable. To connect more than 2 computers, better use a switch.
You can use a switch to connect different pieces of equipment. For example, a standard ADSL router only has a port for a single Ethernet cable. If you want to connect 2 or more computers to the Internet, you can use a switch. In this case, the ADSL router and each computer connect to the switch, via a standard Ethernet cable.
If you don't have an Internet connection, you can still set up a home network to share files, etc. To connect only 2 computers, you can connect them directly via a crossover cable. To connect more than 2 computers, better use a switch.
You can use a switch to connect different pieces of equipment. For example, a standard ADSL router only has a port for a single Ethernet cable. If you want to connect 2 or more computers to the Internet, you can use a switch. In this case, the ADSL router and each computer connect to the switch, via a standard Ethernet cable.
If you don't have an Internet connection, you can still set up a home network to share files, etc. To connect only 2 computers, you can connect them directly via a crossover cable. To connect more than 2 computers, better use a switch.
You can use a switch to connect different pieces of equipment. For example, a standard ADSL router only has a port for a single Ethernet cable. If you want to connect 2 or more computers to the Internet, you can use a switch. In this case, the ADSL router and each computer connect to the switch, via a standard Ethernet cable.
If you don't have an Internet connection, you can still set up a home network to share files, etc. To connect only 2 computers, you can connect them directly via a crossover cable. To connect more than 2 computers, better use a switch.
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Explain each type of network devices with its function?
Computer network devices also known as communication devices and they constitute a data communication network. These devices are routers, switches, hubs, LAN cards, gateway, modems, hardware firewall, CSU/DSU, ISDN terminals and transceivers. In an Ethernet or WAN network, the data communication cannot be performed without these devices. Being an IT professional or a network administrator, you must have the good understanding of these devices.
What is the minimum number of computers required for a network?
There must be at least 2 computers to form a network. However, a standalone machine that is connected to the Internet (which is itself a vast network of computers) is considered part of that network and is therefore regarded as a subnet even though there's only one machine in that subnet.
How can you determine the ip address of a network printer?
If you have physical access to the printer take a look at the printer's configuration menus or have the printer print it out.
You can try pinging the printer by name to see if it responds or if you have access to the print queue configuration information it will be listed there.
What is the major advantage of shielded twisted-pair over unshielded twisted pair cable?
UTP-Unshielded Twisted Pair. Normally UTP contains 8 wires or 4 pair. 100 meter maximum length. 4-100 Mbps speed.
STP-Shielded twisted pair. 100 meter maximum length. 16-155 Mbps speed. Lower electrical interference than UTP
In IPv4 addressing an IP address whose first octet is in the range of 192-223 belongs to a class?
Class C
A network card, network adapter, network interface card or NIC is a piece of computer hardware designed to allow computers to communicate over a computer network. It is an OSI model layer 2 item because it has a MAC address. Every network card has a unique 48-bit serial number called a MAC address, which is written to ROM carried on the card. Every computer on a network must have a card with a unique MAC address. The IEEE is responsible for assigning MAC addresses to the vendors of network interface cards. No two cards ever manufactured should share the same address. Whereas network cards used to be expansion cards to plug into a computer bus, most newer computers have a network interface built into the motherboard A separate network card is not required unless multiple interfaces are needed or some other type of network is used. The card implements the electronic circuitry required to communicate using a specific physical layer and data link layer standard such as ethernet or token ring. This provides a base for a full network protocol stack, allowing communication among small groups of computers on the same LAN and large-scale network communications through routable protocols, such as IP. There are four techniques used for transfer of data, the NIC may use one or more of these techniques. * Polling is where the microprocessor examines the status of the peripheral under program control. * Programmed I/O is where the microprocessor alerts the designated peripheral by applying its address to the system's address bus. * Interrupt-driven I/O is where the peripheral alerts the microprocessor that its ready to transfer data. * DMA is where the intelligent peripheral assumes control of the system bus to access memory directly. This removes load from the CPU but requires a separate processor on the card. A network card typically has a twisted pair, BNC, or AUI socket where the network cable is connected, and a few LEDs to inform the user of whether the network is active, and whether or not there is data being transmitted on it. The Network Cards are typically available in 10/100/1000 Mbit/s. This means they can support a transfer rate of 10 or 100 or 1000 Mbit/s.
What cable will use for connecting switch to switch?
Most switches and routers these days allow for a standard straight through cable to connect each other. (So any CAT 5e or 6 cable you find at Best Buy will be fine)
Older devices (Such as a Cisco 2900xl switch) require a cross over cable to connect like devices such as a switch to switch. These cables can also be found at Best Buy and will be clearly labeled "Cross Over".
There are two different standards of straight through cables if making your own. See the related link.
To make a cross over cable, wire one end with the A standard and the other with the B standard.
Which application is best suited for using UDP?
UDP is used for those applications that require speed, not quality of transmission. This would include streaming audio and video, and Voip. If you lose a packet or two it doesn't make a great deal of difference compared to file transfer protocol, where everything must arrive correctly.
What are standardized procedures for communicating between network devices?
These are called protocols - a standard set of rules for common communications across networks.
Which cable use between PC to Console port of Router?
A rollover cable with a RJ-45 connector will plug into a console port on a Cisco device, the other end can be a DB-9 connector or another RJ-45 that can plug into an adapter.
What are the Pitfalls of client server computing?
It is more expensive and sophisticated as compared to a peer to peer network, can take more troubleshooting, and usually requires a dedicated network administrator which sufficient training to manage the network (comes down to cost).
Plus, the software to manage the network is more complex and can be more costly (in a non-open-systems area).
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Where is Wide area network found?
A Wide Area Network is a connection between two or more network LAN segments that are a distance apart, usually too far apart to be connected as just 1 LAN. They may connect networks in different cities, countries, etc., over a wide distance.
Where are they found? All over the world, wherever the connections on a wide distance are required.
What commands would you use to map a network drive in both windows 9x and 2000?
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What are two ways that a router can learn of the paths to destination networks?
Update from other routers
ARP request from connected routers
What are three basic operations of reliability in the transport layer?
- tracking transmitted data
- acknowledging received data
- Retransmitting acknowledge data
What are the requirement to make peer to peer network?
For an Ethernet network, each computer needs a network card and a network cable. You also need a switch - each computer will be connected to the switch.
For a wireless network, you don't need cables (that's the whole idea of wireless!), but each computer needs a wireless network card instead. Instead of the switch, you would use a wireless access point.
