Content Standard 5.0

NOTICE: This Page is currently being revamped and added on to. In the meantime, the information in here is still relevant and can be used for studying.

Overview:

Additional Information that you should know that isn't included here:

OSI Model

Layer 7: Application: Integrates network functionality into the host operating system.

Layer 6: Presentation: Formats, or presents, data in a compatible form.

Layer 5: Session: manages the sessions in which data are transferred.

Layer 4: Transport: Provides a transition between the upper and lower layers of the OSI model.

Layer 3: Network: Describes how data is routed across networks and on to the destination.

Layer 2: Data Link: Defines the rules and procedures for hosts as they access the Physical layer.

Layer 1: Physical: Sets standards for sending and receiving electrical signals between devices.

Layer 1: Data Link Layer

Layer 2: Internet Layer

Layer 3: Transport Layer

Layer 4: Application Layer

Types of Wired Connections

Common Ports and Protocols:

TCP (Transmission Control Protocol)

UDP (User Datagram Protocol)

ICMP (Internet Control Message Protocol)

IGMP (Internet Group Management Protocol)

Port 20,21 : FTP (File Transfer Protocol)

Port 22:

Port 23: Telnet

Port 25: SMTP (Simple Mail Transfer Protocol)

Port 53: DNS (Domain Name System)

Port 67, 68: DHCP (Dynamic Host Configuration Protocol)

Port 69: TFTP (Trivial File Transfer)

Port 80: HTTP (Hypertext Transfer Protocol)

Port 110: POP (Post Office Protocol)

Port 123: NTP (Network Time Protocol)

Port 137, 138, 139: NetBIOS

Port 143: IMAP (Internet Message Access Protocol)

Port 161, 162: SNMP (Simple Network Management Protocol)

Port 443: HTTPS (Hypertext Transfer Protocol Secure)

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