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11.carroll Inglês 10 flashcards

Flashcards do conjunto (10)

1state two hardware devices1.router
connects the networks (i.e the internet)
2.switch
2coaxial twisted pair fiber opticcoaxial - cheap noisy
twisted pair - medium
optical fiber - fast expensive
3LAN - characteristicslocal area network
fast - good connection within one site
4WAN - characteristicswide area network
slower - global range (internet)
5network topographybus is cheap but easy to break (fault)
star has expensive hardware but is resilient to fault as each node connects to the center
6ProtocolsHTTP -> send audio video
IMAP -> emails
FTP -> files
VOIP -> voice
IP -> IP
7HTTP/HTTPSHTTPS is secured by encryption, that is to obscure the message so than only intended recipient can read the message
HTTP
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 private network, bridges two networks together to virtually appear as one.
can access more files on more than one computer
easier to be hacked as if they were in the building