Question | Answer |
This layer is closest to the end user. | Application Layer |
Application Layer PDU | Data |
What is the function of the Application Layer? | Provides an interface between applications and the networking stack. |
What type of addresses does the Application Layer use? | URLs, Domain(DNS), Email |
What is an example of an Application Layer address? | name@example.com / http://www.example.com |
Name three protocols used by the Application Layer. | DHCP, DNS, FTP, HTTP, IMAP, NTP, POP3, RDP, SMTP, SNMP, SSH, Telnet, TFTP, Gopher, H.323, IRCP, LDAP |
This layer establishes a context between Application Layer entities. | Transport Layer |
Transport Layer PDU | Segment |
What is the function of the Transport Layer? | Session management, END TO END DELIVERY, segmentation, flow control. |
What type of address does the Transport Layer use? | Ports |
What is an example of a Transport Layer address? | 25-SMTP / 80-HTTP / 443-HTTPS(SSL) / 3389-RDP / 53-DNS |
Name three protocols used by the Transport Layer. | TCP, UDP, SPX, RSVP, RTSP, RTP |
This layer provides the functional and procedural means of transferring variable length data sequences from a source to a destination. | Network Layer |
Network Layer PDU | Packet |
What is the function of the Network Layer? | Host to host delivery over a logical, routable network. |
What type of address does the Network Layer use? | IP |
What is an example of a Network Layer address? | 192.168.0.1 /24 | 172.16.81.45 /16 | 10.42.190.240 /8 | 63.47.102.99 /27 |
Name three protocols used by the Network Layer. | IPv4, IPv6, IPX, IPsec, ICMP, IGMP, RIP, EIGRP, OSPF, BGP, IS-IS |
Data Link Layer PDU | Frame |
What is the function of the Data Link Layer? | Interface to interface delivery |
What type of addressing does the Data Link Layer use? | MAC |
What is an example of a Data Link Layer address? | 01:58:A4:5D:65:82 |
Name three protocols used by the Data Link Layer. | Ethernet (802.3), Wireless (802.11a/b/g/n), Bluetooth (802.15), FDDI, ATM, Frame Relay, SDLC, HDLC, PPP, L2TP, PPTP, Token Ring |
This sub-layer controls how a computer on the network gains access to the data and permission to transmit it. Also, it generates the electrical, optical, or radio frequence signaling. | MAC (Media Access Control) |
This sub-layer controls frame synchronization, flow control, and error checking, and message delineation. | LLC (Logical Link Control) |
This layer conveys the bit stream. | Physical Layer |
Physical Layer PDU | None |
What is the function of the Physical Layer? | Generate and recieve electrical, electromagnetic, radio, optical, or other signals. |
What type of address does the Physical Layer use? | None |
What is an example of the type of address the Physical Layer uses? | None |
Name three protocols used by the Physical Layer. | Unipolar, Bipolar, Frequency (light), QUAM, Manchester |