Security+ 701 Ports, Protocols, and OSI Model

CompTIA Security+ Prep

FTP meaning

File Transfer Protocol

SSH meaning?

Secure Shell

SMTP meaning?

Simple Mail Transfer Protocol

TACACS+ meaning?

Terminal Access Controller Access-Control System Plus

DNS meaning?

Domanin Name System

DHCP meaning?

Dynamic Host Configuration Protocol

HTTP meaning?

Hypertext Transfer Protocol

Kerberos port number and layer?

88, Layer 7

POP meaning?

Post Office Protocol

Network Time Protocol port number and layer?

123, Layer 7

SMB meaning?

Server Message Block

IMAP meaning?

Internet Message Access Protocol

SNMP meaning?

Simple Network Management Protocol

LDAP meaning?

Lightweight Directory Access Protocol

HTTPS meaning?

Hypertext Transfer Protocol Secure

SSTP meaning?

Secure Socket Transfer Protocol

IPSec meaning?

Internet Protocol Security

SMTPS meaning?

Simple Mail Transfer Protocol Security

LDAPS meaning?

Lightweight Directory Access Protocol Secure

FTPS meaning?

File Transfer Protocol Secure

IMAPS meaning?

Internet Message Access Protocol Secure

POP3S meaning?

Post Office Protocol 3 Secure

RADIUS meaning?

Remote Authorization Dial-In User Service

RADIUS port number and layer?

1812/1813, Layer 7

RDP meaning?

Remote Desktop Protocol

RDP port number and layer?

3389, Layer 7

Diameter port number and layer?

3868, Layer 7

SRTP meaning?

Secure Real Time Protocol

SRTP port number and layer?

5004, Layer 7

TCP meaning?

Transmission Control Protocol

TCP port number and layer?

N/A, Layer 4

UDP meaning?

User Datagram Protocol

UDP port number and layer?

N/A, Layer 4

PPTP meaning?

Point to Point Tunneling Protocol

PTPP port number and layer?

1723, Layer 4

L2TP meaning?

Layer 2 Tunneling Protocol

L2TP port number and layer?

1701, Layer 2

Layer 7

Application Layer - Email, web browsing, file transfer

Layer 6

Presentation Layer - TLS/SSL encryption, file format conversion (JPG, MP4), compression (gzip), and data serialization (JSON, XML)

Layer 5

Session Layer - managing user login sessions on websites, Zoom meeting connections, remote desktop sessions (RDP), SQL database interactions, and NFS file sharing, ensuring proper data exchange

Layer 4

Transport Layer - protocols like TCP (reliable) and UDP (fast), port numbers (e.g., HTTP port 80), and mechanisms such as windowing, sequencing, and segmentation

Layer 3

Network Layer - protocols like IPv4, IPv6, ICMP, and routing protocols (OSPF, BGP), as well as devices like routers and Layer 3 switches

Layer 2

Data Link Layer - Ethernet (IEEE 802.3), Wi-Fi (IEEE 802.11), MAC addresses, Switches, Bridges, ARP (Address Resolution Protocol), PPP, VLANs, and Spanning Tree Protocol (STP)

Layer 1

Physical Layer - cabling (copper/fiber), connectors, wireless signals, network interface cards (NICs), and hubs

FTP port number and layer?

20/21, Layer 7

SSH port number and layer?

22, Layer 7

SMTP port number and layer?

25, Layer 7

TACAS+ port number and layer?

49, Layer 7

DNS port number and layer?

53, Layer 7

DHCP port number and layer?

67/68, Layer 7

HTTP port number and layer?

80, Layer 7

POP port number and layer?

110, Layer 7

SMB UDP port number and layer?

137/138, Layer 7

IMAP port number and layer?

143, Layer 7

SNMP port number and layer?

161/162, Layer 7

LDAP port number and layer?

389, Layer 7

HTTPS port number and layer?

443, Layer 7

SSTP port number and layer?

443, Layer 7

SMB TCP port number and layer?

445, Layer 7

IPSec port number and layer?

500, Layer 7

SMTPS port number and layer?

587, Layer 7

LDAPS port number and layer?

636, Layer 7

FTPS port number and layer?

989/990, Layer 7

IMAPS port number and layer?

993, Layer 7

POP3S port number and layer?

995, Layer 7