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11.hitchin Inglês 10 flashcards

Flashcards do conjunto (10)

1state two network devicesRouter:
Connects the network to other networks (i.e. the internet)
2Coaxial Twisted Pair Fiber OpticCoaxial - cheap noisy
Twisted pair - medium
Optical - fast expensive
3LAN - CharacteristicsLocal Area Network
Fast - good connection - without one site.
4WAN - CharacteristicsWide Area Network
Slower - global range (internet)
5Network TopolgraphyBus is cheap but easy to break (fault)
Star has expensive hardware but is more resilient to fault as each node connects to the center.
6ProtocolsHttp -> send audio video
Imap -> emails
ftp --> files
voip -> voice
ip -> ip
7Http Httpshttp is secured by encryption that is yo obscure the message so than only the intended recipient can real 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 connection
10VPNVirtual Privet Network
bridges two networks together to virtually appear as one.