Homework2

v  Layering (in network design) provides two nice features, explain how ?

 * Decomposes the problem of building a network into more manageable components .

*It provides a more modular design.

v  Define the following terms :

http: The underlying protocol used by the World Wide Web.

URL: the address of a specific Web site or file on the Internet.

link: Some physical medium, such as a coaxial cable or an optical fiber.

node: (connection point) refer to the computers it connects.

packet: Blocks of data as corresponding to some piece of application data such as a file , apiece of email.

Store-and-forward: Packet-switched networks typically use a strategy.

Switched: Store and forward packets.

hosts: Network nodes which use the network.

Router: A node that is connected to two or more networks.

Routing: The process of determining systematically how to forward messages toward the destination node based on its address.

Node address: An identifies a specific computer or terminal in a group of interconnected computers on a network.

Multiplexing: A system resource is shared among multiple users.

Congestion: A switch receive packets faster than it can send them for an extended period of time, then the switch will eventually run out of buffer space, and some packets will have to be dropped, when a switch is operating in this state.

Bit error: A 1 is turned into a 0 or vice versa.

OSL: a standard description or "reference model" for how messages should be transmitted between any two points in a telecommunication network.

TCP/IP:is the basic communication language or protocol of the Internet. It can also be used as a communications protocol in a private network (either an intranet or an extranet. (
Architecture: A blueprints that guide the design and implementation of network.