1. Making connections Connecting a computer to a LAN donna Bair-Mundy

2. Network Interface Card

3. Network Interface Card - pc

5. Network Interface Card - laptop

6. Assigning IP address

19. Finding DNS server

23. DNS server

24. DHCP (Dynamic Host Configuration Protocol) Computer boots Sends “DHCP DISCOVER” packet to DHCP server DHCP server sends IP address

25. Fixed IP address

26. IP Address 128.171.94.192 UH Network Subnet Machine

27. LIS Subnet 128.171.58.___ UH Network LIS subnet Device

28. LIS Subnet 128.171.58.1Router 128.171.58.2Office printer 128.171.58.3Server - Djoser 128.171.58.4Server - Nut 128.171.58.5LIS Chair 128.171.58.6Dr. Harada 128.171.58.7Dr. Jacsó 128.171.58.8 … 128.171.58.254 128.171.58.255[Broadcast] Reserved for router Reserved Unassigned Alice

29. Fixed IP address 128.171.58.8

30. LIS Subnet IP address 128.171.58.___ UH Network LIS subnet Device

31. LIS Subnet IP address 128.171.58.___ Network part of address Device

32. Network part of LIS Subnet IP address 128.171.58.___ 10000000.10101011.00111010.___ What we see What the computer sees

33. Subnet mask 11111111.11111111.11111111.00000000 1s mask network part of address 0s reveal individual device no. 255.255.255.0 Record it as:

34. Subnet mask 128.171.58.8 255.255.255.0

35. Default gateway 128.171.58.8 255.255.255.0 128.171.58.1 (Router that forwards traffic to remote subnets)

36. LIS Subnet 128.171.58.1Router 128.171.58.2Office printer 128.171.58.3Server - Djoser 128.171.58.4Server - Nut 128.171.58.5LIS Chair 128.171.58.6Dr. Harada 128.171.58.7Dr. Jacsó 128.171.58.8 … 128.171.58.254 128.171.58.255[Broadcast] Reserved Alice

37. Ping (echo request) Are you there? I’m alive % ping 128.171.58.11 128.171.58.11 alive

38. Broadcast ping (echo request) Are you there? I’m alive % ping 128.171.58.255 128.171.58.2 alive 128.171.58.3 alive 128.171.58.4 alive Are you there?