Networking

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IPs and MAC addresses

IP Address - Internet protocol - each device has its own unique IP address. IP address can change. address acquired by Internet Service Provider(ISP) dynamic host control protocol (DHCP) for internal networks

To the computer the address is made up of 32 bits or 4 bytes.

MAC - Address burnt into network card so cannot be changed. 48 bits so can be uniquely identified for each device in the world

Compression:

Lossy:

Data is lost when compressed

some data lost but hardly noticeable

Greatest file reduction made

Most common form for internet use as download speed is paramount

Lossless

Data is retrieved when decompressed

restored completely to original

not as much data can be reduced.