NET 150 - skyleroriordan/my-tech-journal GitHub Wiki
Notes:
Application layer
Transport layer TCP, UDP
Network layer Routers
Data link layer
Internet: network of protocols Protocols: controls the sending and receiving of messages TCP, IP, HTTP, 802,11
Routing;: determines route taken by packets Forwarding: moves packets from router input to router output
Network structure: Network edge: hosts- clients and servers
Access networks, physical media: Wired and wireless communication links
Network core; Mesh of interconnected routers Packet-switching; hosts break application-layer messages into packets
Data link layer- switches Networked devices have a interface to LAN- called a Network Interface Card (NIC) NIC contains MAC address IP address has both network id and host id
Hubs are dumber layer 1 devices that broadcast to everyone
Systems in a LAN find each others MAC and IP address with ARP
IP address: 32 bit number
Displayed as four 8 bit numbers
Computer reads it in binary
IP includes both network id and host id
Net id at beginning
Subnet mask determines how many bits in net id
Labs:
Lab 1-1 - Network Connectivity testing
Lab 2-1: Intro to Packet Tracer and Deploying/Pinging Devices
Lab 2-2 - Observing LAN Activity
LAB 3-2 - Exploring Broadcast Domains
Lab 4-1 Observing ARP in Packet Tracer
Lab 4-3 Simple 2-Network Packet Tracer Lab
Lab 6-2 - Classful Subnetting - Packet Tracer