Week 0

Question 1

What is a computer network?

Answer 1

Consists of two or more computers that are linked in order to share resources, exchange files, or allow electronic communications.

Question 2

Computer networks today

Answer 2

Communication is really important. Creation and interconnection of robust data networks has had a effect on communication, new platform of modern communications.
Networks help create a world which borders, distances, physical limitations become less relevant.
Networks have changed the way people work, learn, play, and the way we communicate.

Question 3

Common networking terms

Answer 3

Node: Single device in a network.
A host: A node or other device that is assigned a unique TCP/IP network address that enables it to communicate with other hosts connected to the network.
Transmission: Transmitting data signals or the progress of those data signals after having been transmitted.
Wireless(Unbounded or unguided) transmission: Sending data over the air using radio, microwave, or infrared signals between nodes.
Wired(Bounded or guided) transmission media: Sending data through cable using light or electrical signals between nodes.
Transmission media: Communication pathways that carry the data signals between devices.
Internetwork device: Device like switch or wireless access point that connects nodes to each other and local network.
A network broken up(segmented) to cope with restrictions placed on the media by standards to increase network performance and security.
Segment: A part of network, single length of cable, an electrical connection between devices that share communication pathway, like cable between computer and switch.
Data communications: The transfer of data using analogue or digital signals.
Backbone: Fast link that connects segments and shared devices on a LAN. Backbones also created between LANs, WANs, and networks and the internet by internetwork devices.
Link: Active connection created over media between devices.