ACIT 2620 - Principles of Enterprise Networking

week 1

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Objectives:

• Overview of networking concepts and terminologies
• Layered networking model
• Project introduction
• Packet capture

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What is the internet?

• What is it made of?
• What is its purpose?
• How does it work?

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Network

Collection of nodes connected by some type of transmission media or link, for the purpose of sharing services, devices or data (i.e. networked resources)

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Node

Any device that can communicate over the network and is identified by a unique identifying number, known as its network address

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Link

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Media concurrency and direction

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Resource Control

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Client-server Networks

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Peer-to-peer Networks

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Types of Networks

• LAN
• WLAN
• PAN
• CAN
• MAN

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• WAN
• SAN
• EPN
• VPN

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Switching method

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Circuit Switching

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Packet Switching

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Layered networking model

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Layered why?

• Managing complexity: explicit structure allows identification and makes explicit the relationship of complex system’s pieces
• Modularization: Changing of an implementation of a specific layer’s service is hidden from the rest of the system

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Protocol Data Units (PDU)

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Protocols

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• Mutually agreed upon rules for communication
• Define the format, order of messages sent and received among network entities, and actions taken upon transmission, receipt, and timeout
• Govern all communication activity on the Internet

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TCP/IP protocol suite

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Wireshark

• A tool for capturing network traffic for analysis
• Grab the installer and install it on your system

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Reading List

• Week One (yes, this week!)

  • OSI MOdel

• Optional reading:

  • Wireshark: filtering while capturing
  • Capture filters
  • Display filters

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• Week Two (read/watch this before next class)

  • Common Network Infrastructure devices
  • Network Topologies
  • Overview of networks

• Optional:

  • Linux command line (recommended for beginners)