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CCNA > Common Ports > Flashcards

Common Ports Flashcards

To learn common ports used by most servers

1
Q

Telnet (unencrypted)

A

tcp/23

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2
Q

SSH

A

tcp/22

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3
Q

DNS

A

udp/53

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4
Q

SMTP

A

tcp/25

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5
Q

IMAP4

A

tcp/143

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6
Q

POP3

A

tcp/110

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7
Q

FTP

A

tcp/20 and 21

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8
Q

TFTP

A

udp/69

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9
Q

SFTP

A

tcp/22

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10
Q

DHCP

A

udp/67 and 68

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11
Q

HTTP

A

tcp/80

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12
Q

HTTPS

A

tcp/443

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13
Q

SNMP

A

udp/161

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14
Q

RDP

A

tcp/3389

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15
Q

NTP

A

udp/123

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16
Q

SIP

A

tcp/5060 and 5061

17
Q

H.323

18
Q

SMB

19
Q

LDAP

20
Q

LDAPS

21
Q

ICANN

A

Internet Corporation for Assigned Names and Numbers

22
Q

ARIN

A

American Registry for Internet Numbers

23
Q

IANA

A

Internet Assigned Numbers Authority

24
Q

Class A Subnet

A

1 - 126 : 255.0.0.0 /8

25
Q

Class B Subnet

A

128 - 191 : 255.255.0.0 /16

26
Q

Class C Subnet

A

192-223 : 255.255.255.0 /24

27
Q

NAT

A

Network Address Translation

28
Q

Class A Private Range

A
  1. 0.0.0 - 10.255.255.255

255. 0.0.0

29
Q

Class B Private Range

A
  1. 16.0.0 - 172.31.255.255

255. 255.0.0

30
Q

Class B Non-Routable Private Range

A
  1. 254.0.0 - 169.254.255.255

255. 255.0.0

31
Q

Class C Private Range

A
  1. 168.0.0 - 192.168.255.255

255. 255.255.0

32
Q

APIPA

A

Automatic Private IP Addressing

Non-routable addressing assigned to a host that did not have an IP address manually or dynamically assigned

33
Q

Unicast

A

One-to-one communication flow

34
Q

Broadcast

A

One-to-all communication flow

35
Q

Multicast

A

One-to-many communication flow

36
Q

Multicast group

A

Creates an IP address in the class D range

CCNA (4 decks)

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