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General Computing > Protocols > Flashcards

Protocols Flashcards

1
Q

TCP

A

Transport Control Protocol - connection-oriented. 3-way handshake ensures the information is delivered

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2
Q

UDP

A

User Datagram Protocol - connection-less - packets are transmitted, no guarantee it arrived

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3
Q

SNMP

A

Simple Network Management Protocol - UDP-based, collects infrastructure info. Routers switches, servers, etc.

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4
Q

SNMP port number

A

161, 162

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5
Q

NTP

A

Network Time Protocol - UDP-based - Useds for time syncronization between servers

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6
Q

NTP port number

A

123

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7
Q

SIP

A

Session Initiation Protocol - UDP-based - for transferring voice and video

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8
Q

SIP port number

A

5060 (plain), 5061 (encrypted using TLS)

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9
Q

RTSP

A

Real-time streaming protocol - UDP-based, for streaming media

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10
Q

RTSP port number

A

554

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11
Q

FTP

A

File Transfer Protocol - TCP-based - for transferring files

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12
Q

FTP port number

A

20 (for transferring data), 21 (for establsihing connection)

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13
Q

TFTP

A

Trivial file transfer protocol - UDP-based - Like FTP but does not ask for username/password

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14
Q

TFTP port number

A

69

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15
Q

SFTP

A

Secure File Transfer Protocol - TCP-based, Like FTP but encrypted

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16
Q

SFTP port number

A

22

17
Q

SSH

A

Secure Shell - TCP-based

18
Q

SSH port number

A

22

19
Q

LDAP

A

Lightweight Directory Access Protocol - UDP or TCP-based - Gets directory information such as lists of users or lists of devices - Used by Active Directory

20
Q

LDAP port number

A

389

21
Q

RDP

A

Remote Desktop Protocol - UDP or TCP-based - Windows-based, to connect in to use another computer, like SSH, including GUI

22
Q

RDP port number

A

3389

23
Q

Telnet

A

TCP-based, connect to another computer, command-line only

24
Q

Telnet port number

A

23

25
Q

SMTP

A

Simple Mail Transfer Protocol - TCP-based - Mail server to mail server communication

26
Q

SMTP port number

A

25 (plain), 465 (encrypted)

27
Q

IMAP4

A

Internet Message Access Protocol - TCP-based - retains copy of mail on server when downloaded

28
Q

IMAP4 port number

A

143 (plain), 993 (encrypted)

29
Q

POP3

A

Post Office Protocol - TCP-based - does not retain copy of mail when downloaded, local only

30
Q

POP3 port number

A

110 (plain), 995 (encrypted)

31
Q

DNS

A

Domain Name System - UDP and TCP-based - for resolving domain names to IP addresses

32
Q

DNS port number

A

53

33
Q

DHCP

A

Dynamic Host Configuration Protocol - UDP-based - Used for computer to request an IP address. DHCP server supplies it, plus subnet mask, defautl gatewat and DNS records

34
Q

DHCP port number

A

67, 68

35
Q

HTTP

A

Hypertext Transfer Protocol - TCP-based - unencrypted web transfer

36
Q

HTTP port number

A

80

37
Q

HTTPS

A

Hypertext Transfer Protocol Secure - TCP-based - encrypted web transfer

38
Q

HTTPS port number

A

443

General Computing (3 decks)

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