NET-330: Network Design
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  • NET-330: Network Design
  • Breakdown
    • Course Overview
    • Week Breakdown
  • Labs
    • Lab 1.2: Packet Tracer Review-Class Lab
    • Lab 2.1: Subnet Design
    • Lab 3.2: Lab Prep
    • Lab 3.3: DHCP Server in Packet Tracer
    • Lab 4.1: Console Access Mini-Lab
    • Lab 4.2: Small Enterprise-Class Lab
    • Lab 6-1: NAT Configuration - Static NAT
    • Lab 6-2: NAT Configuration - PAT
    • Lab 6-3: NAT LAB 3 - Champlain Example Lab
    • Lab 8-1B: OSPF PT Activity
    • Lab 8-1B: Add OSPF Authenication
    • Lab 9-1: Build a Network Challenge - 1
    • Lab 9-2: Build a Network Challenge 2 - BGP
    • Lab 10-1: IPSEC Packet Tracer 1
    • Lab 11-1: Access-Lists
    • Lab 13-1: IPv6
  • Notes
    • Resources
    • Week 1: Subnet Refresher
    • Week 2: Subnetting, VLANS, & Cisco Commands
    • Week 3: DHCP
    • Week 4 & 5: Campus and Enterprise Network Design Layers
    • Week 6: NAT
    • Week 9: OSPF and Interior Routing
    • Week 10: BGP
    • Week 11: IPSEC
    • Week 12: Zoning and ACL
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  1. Notes

Week 1: Subnet Refresher

Week 1: 8/29/22

PreviousResourcesNextWeek 2: Subnetting, VLANS, & Cisco Commands

Last updated 2 years ago

  • Dartmouth had hundreds of subnets just in the datacenter

  • 2^32 IPv4 addresses | 32 bits

Letter
Packet
  1. Look up recipient address

    1. Phone Book? Other Directory?

    2. Get zip code and street address

  2. Put in addressed envelope

    1. Write recipient and return address on envelope

  3. Put letter in mailbox

  4. Mail carrier picks letter up

    1. Take letter to local post office

  5. Post Office sorts and sends to next PO facility

    1. Uses zip code

  6. How does PO know where to send next?

    1. Postal Service has “routing lists”

  7. Ends up at local PO recipient

  8. Mail Carrier delivers to recipient

    1. Uses street address

  1. Look up recipient address

    1. Domain Name System (DNS)

    2. Convert Hostname to IP address

  2. Add “Headers” to data (encapsulate)

  3. Send packet to network interface controller (NIC)

  4. Transmits onto network

    1. Sent to local router (AKA default gateway)

  5. Router sends packet to next router

    1. Uses network part of the IP Address

  6. How does the router know where to send next?

    1. “Routing table” of IP networks

  7. Ends up at local router of recipient

  8. Router and switches send to recipient

    1. Uses Host part and IP address and Mac address`

  • ^Mailbox ^ Mail server -> translates to ip address

TODO:

  • Download Packet Tracer 8.1.1

grandma@aol.com