module05-datalinkV3

module05-datalinkV3 - Data Link Protocols Relates to Lab 2....

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
1 Data Link Protocols Relates to Lab 2. This module covers data link layer issues, such as local area networks (LANs) and point-to-point links, Ethernet, and the Point-to-Point Protocol (PPP).
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
2 TCP/IP Suite and OSI Reference Model Application Layer Transport Layer Network Layer (Data) Link Layer The TCP/IP protocol stack does not define the lower layers of a complete protocol stack In this lecture, we will address how the TCP/IP protocol stacks interfaces with the data link layer Logical Link Control (LLC) Media Access Control (MAC) Sublayer in Local Area Networks
Background image of page 2
3 Data Link Layer The main tasks of the data link layer are: Transfer data from the network layer of one machine to the network layer of another machine Convert the raw bit stream of the physical layer into groups of bits (“ frames ”) Network Layer Data Link Layer Physical Layer Network Layer Data Link Layer Physical Layer
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
4 Two types of networks at the data link layer Broadcast Networks : All stations share a single communication channel Point-to-Point Networks: Pairs of hosts (or routers) are directly connected Typically, local area networks (LANs) are broadcast and wide area networks (WANs) are point-to-point Broadcast Network Point-to-Point Network
Background image of page 4
5 Local Area Networks Local area networks (LANs) connect computers within a building or a enterprise network Almost all LANs are broadcast networks Typical topologies of LANs are bus or ring or star We will work with Ethernet LANs. Ethernet has a bus or star topology. Bus LAN Ring LAN
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
6 MAC and LLC In any broadcast network, the stations must ensure that only one station transmits at a time on the shared communication channel The protocol that determines who can transmit on a broadcast channel are called Medium Access Control (MAC) protocol The MAC protocol are implemented in the MAC sublayer which is the lower sublayer of the data link layer
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 21

module05-datalinkV3 - Data Link Protocols Relates to Lab 2....

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online