1. 1 Addressing, Internetworking

2. 2 Collection of Subnetworks The Internet is an interconnected collection of many networks.

3. 3 IP Addresses IP address formats.

4. 4 IP Addresses Special IP addresses.

5. 5 Subnets A campus network consisting of LANs for various departments.

6. 6 Subnets A class B network subnetted into 64 subnets.

7. 7 CIDR – Classless Inter Domain Routing A set of IP address assignments. 5-59

8. 8 NAT – Network Address Translation Placement and operation of a NAT box.

9. 9 Internet Control Message Protocol The principal ICMP message types. 5-61

10. 10 ARP– The Address Resolution Protocol Three interconnected /24 networks: two Ethernets and an FDDI ring.

11. 11 Dynamic Host Configuration Protocol Operation of DHCP.

12. 12 Network Layer Design Isues Store-and-Forward Packet Switching Services Provided to the Transport Layer Implementation of Connectionless Service Implementation of Connection-Oriented Service Comparison of Virtual-Circuit and Datagram Subnets

13. 13 Store-and-Forward Packet Switching The environment of the network layer protocols. fig 5-1

14. 14 Implementation of Connectionless Service Routing within a diagram subnet.

15. 15 Implementation of Connection-Oriented Service Routing within a virtual-circuit subnet.

16. 16 Comparison of Virtual-Circuit and Datagram Subnets 5-4

17. 17 Internetworking How Networks Differ How Networks Can Be Connected Concatenated Virtual Circuits Connectionless Internetworking Tunneling Internetwork Routing Fragmentation

18. 18 Connecting Networks A collection of interconnected networks.

19. 19 How Networks Differ 5-43

20. 20 How Networks Can Be Connected (a) Two Ethernets connected by a switch. (b) Two Ethernets connected by routers.

21. 21 Concatenated Virtual Circuits Internetworking using concatenated virtual circuits.

22. 22 Connectionless Internetworking A connectionless internet.

23. 23 Tunneling Tunneling a packet from Paris to London.

24. 24 Fragmentation (a) Transparent fragmentation. (b) Nontransparent fragmentation.

25. 25 Fragmentation Fragmentation when the elementary data size is 1 byte. (a) Original packet, containing 10 data bytes. (b) Fragments after passing through a network with maximum packet size of 8 payload bytes plus header. (c) Fragments after passing through a size 5 gateway.