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11.smith Inglés 10 fichas

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1State two network devicesRouter
Connects the network to other networks (ie the internet)
Switch
2Coaxial Twisted pair Fiber opticCoaxial - cheap noisy
Twisted pair - medium
Optical - fast expensive
3LAN CharacteristicsLocal area network
fast - good connection - within one site
4WAN CharacteristicsWide area network
slower - global range (internet)
5network topologybus is cheaper but easy to break (fault) star has expensive hardware but is more resiltent to fault as each node connects to the centre
6protocolshttp - send audio video
imap - emails
ftp - files
viop - voice
ip -ip
7http httpshttps is secured by encryption, that is to obscure the message so then the only intended recipient can read the message
8ipv4 ipv6ipv6 has six sets of numbers to uniquely identify an internet address. ipv4 is old and has few possible combinations and will eventually be replaced by ipv6.
9wired vs wirelesswired network faster speed, better connection, must be plugged in not at all portable.
wireless free of wires easier to add new users, slows down as more users are added, limited range connection prone to interference and dropping connecion
10VPNVirtual private network, brides two networks together to virtually appear as one.