C1 - 2.1 - Compare and contrast Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) ports, protocols, and their purposes.

TCP

Transport Control Protocol

UDP

User Datagram Protocol

When should you use TCP connections?

Use TCP when reliable and accurate data delivery is crucial, like with file transfers, emails, and web browsing.

When should you use UDP connections?

Use UDP when speed and low latency are crucial, even if some data loss is acceptable ie Video Streaming.

What uses TCP port 20 (data) and 21 (control)

FTP

TCP Port 20

FTP data. File transfer protocol. Frequently called 'data'. Carries the actual files being uploaded or downloaded.

TCP Port 21

FTP. Frequently called 'control'. Establishes connections and receives responses.

TCP port 22 is used for ___ service

SSH

Port 23 (TCP/UDP)

Telnet - Unencrypted method to remotely administer network devices (should not be used)

Port 25, Used for email routing between mail servers

Simple Mail Transfer Protocol (SMTP)

Port 80 (TCP)

Hypertext Transfer Protocol (HTTP)

Port 110 is the well-known port used by:

POP3

Port 389 TCP/UDP

Lightweight Directory Access Protocol (LDAP)

Port 443 (TCP)

HTTPS (Hyper Text Transfer Protocol Secure)

Port 445 is used by: (Select 2 answers)

Server Message Block (SMB)
Common Internet File System (CIFS)

Port 3389, Provides a user with a graphical interface to connect to another computer over a network connection

Remote Desktop Protocol (RDP)

Domain Name System (DNS)

translates domain names into IP addresses

Port 53 (TCP/UDP)

DNS

Port 67

DHCP server. Offers and gives ip addresses.

Port 68

DHCP Client. Asks for and accepts IP addresses from DHCP servers.

Port 137-139

NetBIOS name resolution , Netbios Datagram distribution , and Netbios Session Services.

Port 143 (TCP)

IMAP (Internet Message Access Protocol).

IMAP (Internet Message Access Protocol)

TCP/UDP 143

Port 161

Simple Network Management Protocol (SNMP)

What does port 161 do through SNMP

sends commands

What does port 162 do through SNMP

receives traps