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21 Cards in this Set
- Front
- Back
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Well Known Ports |
Ports 0-1023 Used to identify a network service on a private IP network or the public internet. Port numbers reside in the TCP or UDP header and are used to direct to the appropriate application in the server |
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SSH |
Secure Shell
TCP/22
Encrypted alternative to TELNET
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DNS |
Dynamic Name System
UDP/53
Converts Fully Qualified Domain Names (FQDNs) to IP addresses
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SFTP |
Secure File Transfer Protocol
TCP Port 22 (Uses SSH)
Full File System Functionality |
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SMTP |
Simple Mail Transfer Protocol TCP/25
Used for sending mail between mail servers Also used for SENDING mail from device to server |
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FTP |
File Transfer Protocol TCP/20 (active mode data) & TCP/21 (control)
Transfers files between systems Authenticates with username and password Full featured (list, add, delete, etc.) |
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TELNET |
Telecommunication Network
TCP/23
Used for remote login and console access to devices In-the-clear (unencrypted) communication |
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TFTP |
Trivial File Transport Protocol UDP/69
Very simple file transfer application read/write files No Authentication (not used for important data or on production systems) |
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DHCP |
Dynamic Host Configuration Protocol UDP/67 & UDP/68
Requires DHCP Server IP addresses assigned to hosts from pool Addresses are leased to hosts for set intervals |
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HTTPS |
Hypertext Transfer Protocol Secure TCP/443
Secure webserver communication (browser) |
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SNMP |
Simple Network Management Protocol UDP/161
Used for managing and gathering statistics (metrics) from network devices
v1 - Structured tables, unencrypted v2 - Added bulk transfers, unencrypted v3 - Secure standard. Adds message integrity, authentication, and encryption |
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RDP |
Remote Desktop Protocol TCP/3389
Allows remote connection to an entire desktop or just an application. Clients for Windows, MacOS, Linux, Unix, iPhone, and others. |
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NTP |
Network Time Protocol UDP/123
Used for critical synchronization of time and date between network devices |
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SIP |
Session Initiation Protocol TCP/5060 & TCP/5061
Used to setup and manage VoIP sessions (call, ring, hang up) Extends voice communication by adding video conferencing, instant messaging, file transfer, etc. |
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SMB |
Server Message Block TCP/445
Used for transferring files and sharing printers between Windows systems Also called CIFS (Common Internet File System) Direct communication over TCP without NetBIOS transport |
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HTTP |
Hypertext Transfer Protocol TCP/80
Webserver communication (browser) |
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POP3 |
Post Office Protocol v3 TCP/110
Used for retrieving mail from a server Basic mail transfer functionality |
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LDAP |
Lightweight Directory Access Protocol TCP/389 Used to store and retrieve information in a network directory |
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LDAPS |
Port 636 |
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H.323 |
VoIP signaling protocol ITU Telecommunication H.32x protocol series
TCP/1720
Setup and manage VoIP sessions (call, ring, hang up)
One of the earliest VoIP standards, but still in use today.
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IMAP4 |
Internet Message Access Protocol
TCP/143
Used to authenticate and transfer emails from an email server Allows management of inbox from multiple clients (view same mailbox from desktop and mobile device, etc..) |
