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Security+ > Ports and Protocols > Flashcards

Ports and Protocols Flashcards

1
Q

Port

A

Logical communication endpoint that exists on a computer or server

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2
Q

Inbound Port

A

Logical communication opening on a server that is listening for a connection with a client. I.e Port 443

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3
Q

Outbound Port

A

Logical communication opening created on a client in order to call a server that is listening for a connection.

Open a random high port, I.e. 51233, and send request to web server (port 443)

Connect over secure shell protocol (ssh)

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4
Q

Port # Range

A

0 - 65,535

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5
Q

Well Known Ports

A

0 - 1023 are WKPs and are assigned by the Internet Assigned Number Authority (IANA)

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6
Q

IANA

A

Internet Assigned Number Authority

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7
Q

Registered Ports

A

1024 - 49,151 are usually assigned to proprietary protocols for vendor use. Registered with IANA.

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8
Q

Dynamic and Private Ports

A

49,152 - 65,535 can be used by an application wi the out being registered with IANA.

Used in gaming, instant messaging, and chats for connection

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9
Q

Protocol

A

Defined set of rules governing device communication and data exchange

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10
Q

FTP

A

File Transfer Protocol
TCP
Port 21
Used to transfer files from host to host

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11
Q

SSH

A

Port 22
TCP
Provides secure remote terminal access and file transfer capabilities

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12
Q

SCP

A

Port 22
TCP
Provides secure copy function

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13
Q

SFTP

A

Port 22
TCP
Provides secure file transfers

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14
Q

Telnet

A

Port 23
TCP
Provides insecure remote control of another machine using a text-based environment

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15
Q

SMTP

A

Simple Mail Transfer Protocol
Port 25
TCP
Provides ability to send emails over network

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16
Q

DNS

A

Domain Name System
Port 53
TCP, UDP
Translates domain names to IP addresses

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17
Q

TFTP

A

Trivial File Transfer Protocol
Port 69
UDP
Used as a lightweight file transfer method for sending configuration files or network booting of an operating system

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18
Q

HTTP

A

Hypertext Transfer Protocol
Port 80
TCP
Used for insecure web browsing

19
Q

Kerberos

A

Port 88
UDP
Network authentication protocol

20
Q

POP 3

A

Post Office Protocol Version 3
Port 110
TCP responsible for retrieving emails from a server

21
Q

NNTP

A

Network News Transfer Protocol
port 119
TCP
Used for accessing news groups

22
Q

RPC

A

Remote Procedure Call
Port 135
TCP/UDP
Facilitates communication between different system processes

23
Q

NetBIOS

A

Ports 137, 138, 139
TCP, UDO
Networking protocol suite

24
Q

IMAP

A

Internet Message Access Protocol
Port 143
TCP
Allows access to email messages on a server

25
Q

IMAP

A

Internet Message Access Protocol
Port 143
TCP
Allows access to email messages on a server

26
Q

TCP

A

Transmission Control Protocol

  • Requires established connection before transmitting data
  • can sequence data (send in specific order)
  • Data retransmission - can retransmit if packets fail to arrive
    -guaranteed deliver
    -thorough error checking guarantees data arrives in its intended stay
    -broadcasting not supported
    -slow, but complete deliver
27
Q

UDP

A

User Datagram Protocol

-No connection needed to start and end a data transfer

  • cannot sequence or arrange data
  • no data retransmitting, lost data cannot be received
  • delivery not guaranteed
  • minimal error-checking covers the basics but may not prevent all errors

-broadcasting is supported

-speed is fast, but at risk of incomplete data delivery

28
Q

SNMP

A

Simple Network Management Protocol
Port 162
UDP
Managed network devices

29
Q

SNMP Trap

A

Port 162
UDP
Responsible for sending SNMP trap messages

30
Q

LDAP

A

Lightweight Directory Access Protocol
port 388
Facilitates directory services

31
Q

HTTPS

A

HTTP Secure (HTTPS)
Port 443
Provides secure web communication

32
Q

SMB

A

Server Message Block
Port 445
Used for file and printer sharing over a network

33
Q

SMTPS

A

Simple Mail Transfer Protocol Secure
Port 465 587
TCP
Provides secure SMTP communication
Use SSL, TLS, or TCP connection

34
Q

Syslog

A

Port 514
UDP
Used for sending log messages

35
Q

LDAPS

A

LDAP Secure
Port 636
TCP
LDAP communication over SSL/TLS

36
Q

IMAPS

A

Internet Message Access Protocol over SSL or TLS
Port 993
TCP
Used for secure email retrieval

37
Q

POP3S

A

Post Office Protocol Version 3 over SSL/TLS
Port 995
TCP
Used for secure email retrieval

38
Q

Microsoft SQL

A

Port 1433
TCP
Used to facilitate communication with Microsoft SQL server

39
Q

RADIUS TCP

A

Ports 1645 and 1646
TCP
Used for remote authentication, authorization, and accounting

40
Q

RADIUS UDP

A

Ports 1812 and 1813
UDP
Used for authentication and accounting as defined by Internet Engineering Task Force (IETF)

41
Q

RDP

A

Remote Desktop Protocol
port 3389
TCP
Enables Remote Desktop access

42
Q

Syslog TLS

A

Port 6514

TCP

Used in secure Syslog that uses SSL/TLS to encrypt the IP packets using a certificate before sending them across the IP network to the Syslog collector

43
Q

TLS

A

Transport Layer Security

Encrypts all data sent over the TCP connection

Encryption is performed at the TCP socket layer, not at the application layer.

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