Network Layers

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Physical and Data Link Layer

Physical and Data Link Layer. Computer Network System Sirak Kaewjamnong. Network Devices. A. B. Circuit Switching. Source. Destination. It ’ s the method used by the telephone network. A call has three phases: Establish circuit from end-to-end ( “ dialing ” ), Communicate,

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7. Ethernet A Case study of Physical and Data Link Layer

ENG224 INFORMATION TECHNOLOGY – Part I. 7. Ethernet – A Case Study of Physical and Data Link Layer. 7. Ethernet A Case study of Physical and Data Link Layer . ENG224 INFORMATION TECHNOLOGY – Part I. 7. Ethernet – A Case Study of Physical and Data Link Layer. Origin of Ethernet.

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The Data-Link Layer: Ethernet, ARP and LANs

The Data-Link Layer: Ethernet, ARP and LANs. Based on slides from the Computer Networking: A Top Down Approach Featuring the Internet by Kurose and Ross. The Data Link Layer. Our goals: Understand principles behind data link layer services: Sharing a broadcast channel: multiple access.

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Recap of Layers Application, Data Link and Physical

Recap of Layers Application, Data Link and Physical. S305 – Network Infrastructure. Network Layers. Computer 1. Computer 2. 2. Application Layer. Applications (e.g., email, web, word processing). Application Layer. Transport Layer. Network Layer.

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Tutorial on Network Layers 2 and 3

Tutorial on Network Layers 2 and 3. Radia Perlman Intel Labs (radia@alum.mit.edu). Why?. Demystify this portion of networking, so people don’t drown in the alphabet soup Think about these things critically N-party protocols are “the most interesting”

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Physical and Link Layers

Physical and Link Layers. CS144 Review Session 6 November 6 th , 2008 Roger Liao Based on slides by Ben Nham. Outline. Physical layer Encoding of signals Chips vs. bits Link layer Communication through shared medium Hubs vs. switches. Signaling bits on a link.

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Link & Physical Layers

Shahrood University of Technology Department of Computer Engineering & IT. Computer Networks. Link & Physical Layers. Chapter 5 outline. 5.1 Introduction and services 5.2 Error detection and correction 5.3 Links and Access Protocols 5.4 Ethernet 5.5 Ethernet Model

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Service Providers & Data Link & Physical layers

Service Providers & Data Link & Physical layers. Week 4 Lecture 2. To-day we will look at the WAN and who provides it. AT&T. Telstra. NTT. Optus. IP Links are router to router. Router. Switch. Some background.

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Physical & Data-link

Physical & Data-link. ISQS 6343 #2 John R. Durrett. Media Access Methods. Most important choice is MAC Drives: cable installed performance, cost, reliability IEEE 802 series standards Frame layout: Mac head | LLC head | IP | TCP | data | CRC ARCnet (obsolete). Token Ring. Pros:

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Physical and Data Link Layer s (Layer 1 & 2) : Ethernet (Network Interfce Card)

Physical and Data Link Layer s (Layer 1 & 2) : Ethernet (Network Interfce Card). The Medium Access Sublayer. IEEE Standard 802 for LANS and MANS. IEEE 802.1 High Level Interface IEEE 802.2 LLC (Logical Link Control)

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Network Layers

Network Layers. COMT 625. Overview. IP and general Internet Operations Address Mapping ATM LANs Other network protocols. The Network Layer. Impose a global addressing scheme May also Provide virtual circuit connections Segment and re-assemble packets

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Network Layers

Network Layers. 1. Network Hierarchies Most NWs are organized as a series of layers or levels to reduce design complexity The number of layers, the name, and the function of each layer differ from NW to NW The purpose of each layer is to offer certain services to the higher layers.

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Network Layers

Network Layers. The OSI and Internet Models. Sid Arora, Joseph Huang, Josepha Rood, Eva Smith. What is a layered model?. Models help us to visualize different aspects of complex abstract systems.

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Data Link and Physical Layers

Data Link and Physical Layers. Data Link and Physical Layers. Data Link Logical Link Control Medium Access Physical Still protocols, not the physical cable. Medium Access Control. Contention based vs. controlled access Contention Aloha, Ethernet (IEEE 802.3) Controlled access

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Functions (Responsibilities) of Layers 1. Physical Layer

Functions (Responsibilities) of Layers 1. Physical Layer To carry a bit stream over a physical medium. It deals with the mechanical and electrical specifications of the interface and transmission medium. Bit Steam. Bit Steam. Functions of physical layer

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Network Layers

Network Layers. Application Application Transport Transport Network Network Data-Link Data-Link

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Details of OSI layers : Data Link Layer

Details of OSI layers : Data Link Layer. Instructor(s) F.M. Rashed Amin Shaila Sharmin M Abdullah Al Naser. OSI Data Link Layer. Accessing the Media. Exchange data over common media. Two basic functions: Allows the upper layers to access the media using framing.

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Physical and Data Link Layer s (Layer 1 & 2) : Ethernet (Network Interfce Card)

Physical and Data Link Layer s (Layer 1 & 2) : Ethernet (Network Interfce Card). The Medium Access Sublayer. IEEE Standard 802 for LANS and MANS. IEEE 802.1 High Level Interface IEEE 802.2 LLC (Logical Link Control)

392 views • 38 slides