1. 1 Pertemuan 03 Routing Matakuliah: H0451/Praktikum Jaringan Komputer Tahun: 2006 Versi: 1/0

2. 2 Learning Outcomes Pada akhir pertemuan ini, diharapkan mahasiswa akan mampu : Menjelaskan mengenai Routing

3. 3 Outline Materi Layanan Addressing

4. 4 TCP/IP Concepts

5. 5 IP datagram

6. 6 Connection oriented –Virtual circuit defined for data trasfer Connectionless –Each PDU data transfer (datagram) treated independently Connection Control

7. 7 Addressing Addressing level Addressing scope Connection identifiers Addressing mode

8. 8 Addressing Level Level in communications architecture at which entity is named Unique physical address for each end system (workstation, server), each intermediate system (router), usually is referred as MAC address or Hardware address Network-level address (logical address) –IP address or internet address –Used to route PDU through network At destination data must routed to some process –Each process assigned an identifier –TCP/IP: port, OSI: Service access point (SAP)

9. 9 Addressing Scope Global –Global nonambiguity, Identifies unique system –Enables internet to route data between any two systems Need unique address for each device interface on network –MAC address on IEEE 802 network Enables network to route data units through network and deliver to intended system Addressing scope only relevant for network-level addresses Port or SAP above network level is unique within system, need not be globally unique (e.g port 80 web server listening port in TCP/IP)

10. 10 IPv4 Address Formats

11. 11 Addresses with subnetting

12. 12 Subnets and Subnet Masks Allow arbitrary complexity of internetworked LANs within organization Insulate overall internet from growth of network numbers and routing complexity Site looks to rest of internet like single network Each LAN assigned subnet number Host portion of address partitioned into subnet number and host number Local routers route within subnetted network Subnet mask indicates which bits are subnet number and which are host number

13. 13 Equipment Routers: –At Network layer –Can connect dissimilar LANs on the same protocol –Some routers have support for may protocols and protocol conversion –Can build large complex networks with complex traffic routing –Limits the flow of broadcasts –Load sharing and balancing can be done –Complex features as Network Address Translation (NAT), authentication, firewalling, etc. possible