Local Area Network

The 45 indicates the jack number; RJ45 indicates Registered Jack number 45. However, there is a slight complication - what most people call RJ45 should actually be 8P8C. The RJ numbers used to be allocated by the FCC, but they are now defined by Administrative Council for Terminal Attachment (ACTA).

LAN: Local Area Network

Examples:

1) 2 or more computers connected

2) small office or an internet cafe

WAN: Wide Area Network

Examples:

1) Internet

2) VPN

3) WAN links

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why the lan high speed than wan

They forward only changes to individual routes instead of forwarding entire routing tables., taking up less band and time. Joseph G.

Examples for Metropolitan area network is a network of fire station, newspaper/media company, a chain of community colleges

RIP

Robert Metcalfe

The last 3 octets represent the host portion in a class A address.

It means "Fat of the land."

The digital token based payment system is a new form of electronic payment system which is based on electronic tokens rather than e-cheque or e-cash. The electronic tokens are generated by the bank or some financial institutions. Hence we can say that the electronic tokens are equivalent to the cash which are to be made by the bank.

In general a switch is better than a hub because it doesn't repeat signals to all of the ports (and thus reduces collisions).

remote access is where a computer is used from a different location to where the user is, this is useful to IT staff so they can administer a machine without even being in the same building, home users also benefit from remote access by being able to 'dial in' to their home computers whist at work or elsewhere.

TCP is connection oriented protocol,mean it ensure that a packet is delivered and also set up a connection before sending data to destination source and destination exchange several control signal before sending data.If a packet is lost,TCP resend it. UDP does not establish any communication before sending data.It sends data and forget it.If a packet is lost,application using UDP cannot resend it.A example of UDP is voip,if a packet is lost,a part of conversation is also lost and can not be resend

Flow Control

There are many ways to communicate between networks. The rules for doing so are called protocols, and there are many known protocols. Some are historical in nature (meaning they have been around a long time) and some are newer ones developed in the last few years.

Protocols describe how to communicate and when to communicate. They may be specific to a means of communication (i.e. web traffic, email traffic) or they may be more general (TCP/IP - covering many protocols).

Deciding on which protocol to communicate with other networks is based on how the networks communicate currently and what kind of traffic will be transferred between the two. A protocol is designed so that there are common rules regarding communication, so certain protocols will be used to be common between networks.

TCP/IP is an example of a very common, widely-used communication protocol.

router

Lan switches eliminate collision domain. A single collision domain in a network would mean half duplex as it can only send or receive at one time. each port of a switch is considered a collision domain in itself. so more the number of collision domain , better for the network.

Usually as a rule of thumb a peer to peer network is appropriate when the number of clients is about 10 or less, and you don't need a dedicated technician to run the network. In addition, a peer to peer network is best used when the growth of the network is small or slow as well.

Small departments and companies successfully use peer to peer networking because they do not require anything more costly or sophisticated.

First, make sure it is actually an Ethernet cord, since Phone Lines and Ethernet cords are commonly confused with each other. But if you know its an Ethernet cord, look for a fairly large port that looks rectangular, Google a picture of an Ethernet port and look for it on the back of your computer.

Once you find this port on the back of your computer, plug one side of the cord into it, then the other side into your modem or router.

WAN usually costs more. Especially, there are recurring monthly costs, since you rent the services of an ISP. Note, however, that a LAN and a WAN serve different purposes; you can't simply replace a WAN with a LAN.

In its simplest form - two computers, equipped with ethernet modems, and a suitable length of ethernet vable !

Assuming IPv4 ICMP. Ping uses IP for transport. Ping in itself is an "Echo Request", which is a function of the ICMP protocol. The IP Packet will carry the ICMP protocol from end-to-end.

ICMP has a protocol number of 1, so the "Protocol" field in the IPv4 header will contain "1" as a reference to the ICMP payload.

For IPv6, ICMPv6 is used, and the transport will be IPv6.

Network architectures are classified according to the way they are controlled and the distance between their nodes.

A protocol is a set of rules describing some behavior. In order to communicate in a common manner, the sender and receiver have to agree on the "language" of communication.

A protocol states what those rules are, and because they are a standard, everyone agrees and knows what to expect.