Ports & Protocols Flashcards

1
Q

FTP

A

File Transfer Protocol (Port 20, 21)

Unsecure method of transferring files between client/server
Data transferred in the clear

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2
Q

SSH

A

Secure Shell (Port 22)

Cryptographic network protocol for operating network services securely over an unsecured network
Best known for remote login to computer systems

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3
Q

SFTP

A

SSH File Transfer Protocol (Port 22)

Provides file access/transfer/management over any reliable data stream

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4
Q

Telnet

A

Telnet (Port 23)

Provides bidirectional interactive text-oriented communication facility using a virtual terminal connection.

Like SSH, but unsecure

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5
Q

SMTP

A

Simple Mail Transfer Protocol (Port 25)

Internet standard for sending electronic mail.
RFC 821 was defined in 1982
RFC 5321 developed in 2008 (current version)

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6
Q

DNS

A

Domain Name Services (Port 53)

Hierarchical decentralized naming system for computers/services/resources connected to the internet or a private network.
Converts domain names to IP addresses.

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7
Q

DHCP

A

Dynamic Host Control Protocol (Port 67, 68)

DHCP server dynamically assigns an IP address & other network config parameters to a client.
Enables computers to request IP addresses & network parameters automatically
Reduces burden on network admins

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8
Q

TFTP

A

Trivial File Transfer Protocol (Port 69)

Transmits files in both directions of a client-server application.
Used for booting an OS from a LAN file server
Doesn’t provide user authentication or directory visibility
Essentially a stripped-down version of FTP

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9
Q

HTTP

A

Hyper Text Transfer Protocol (Port 80)

Foundation of data communication for WWW
Designed for distributed, collaborative, & hypermedia presentation across many devices.

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10
Q

POP3

A

Post Office Protocol v3 (Port 110)

Used by local email clients to retrieve email from a remote server over TCP/IP connection

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11
Q

NTP

A

Network Time Protocol (Port 123)

Provides clock synchronization between computer systems over packet-switched, variable-latency data networks.

Est 1985 (one of the oldest Internet protocols in use)

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12
Q

NetBIOS

A

NetBIOS (Port 139)

Provides services allowing apps on separate computers to communicate over a LAN for file & printer sharing.

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13
Q

IMAP

A

Internet Mail Application Protocol (Port 143)

Provides email clients to retrieve email messages from a mail server over a TCP/IP connection.

Allows the end user to view & manipulate messages as if they’re stored locally.

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14
Q

SNMP

A

Simple Network Management Protocol (Port 161)

Provides collection & organization of info about managed devices on IP networks.

Can modify that info to change device behavior, commonly used in network devices.

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15
Q

LDAP

A

Lightweight Directory Access Protocol (Port 389)

Open, vendor-neutral, industry standard for accessing & maintaining distributed directory info services.

LDAP & AD use this port

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16
Q

HTTPS

A

HTTP Secure (Port 443)

Foundation of ecommerce on WWW
Designed for adding security to HTTP

17
Q

SMB

A

Server Message Block (Port 445)

Provides shared access to files, printers, & misc communications between devices on a network.

18
Q

LDAPS

A

LDAP Secure (Port 636)

Secure version of LDAP

19
Q

RDP

A

Remote Desktop Protocol (3389)

Proprietary protocol (Microsoft)
Provides user with GUI to connect to another computer over a network connection.

User employs RDP client software for this purpose & the other computer must run RDP server software.

20
Q

SIP

A

Session Initiation Protocol (Port 5060, 5061)

Provides signaling & controlling multimedia communication sessions in applications.

Used for Internet telephony for voice & audio calls, VOIP, & instant messaging.

21
Q

Syslog

A

System Logging Protocol (UDP: Port 514 | TCP: Port 1468)

Used to send logging data back to a centralized server.

22
Q

SMTP over TLS

A

Simple Mail Transfer Protocol with Transport Layer Security (Port 587)

Secure/encrypted sending of emails

23
Q

IMAP over SSL

A

IMAP with SSL Encryption (Port 993)

24
Q

POP3 over SSL

A

POP3 with SSL Encryption (Port 995)

25
Q

SQL

A

Structured Query Language Server Protocol (Port 1433)
Used for communication from a client to the database engine.

26
Q

SQLnet

A

(Port 1521)
Used for communication from a client to an Oracle database.

27
Q

MySQL

A

(Port 3306)
Used for communication from a client to the MySQL database engine.