Training and Placement

Chapter 8 Communication Networks and Services
Contained Slides by Leon-Garcia and Widjaja

Chapter 8 Communication Networks and Services
The TCP/IP Architecture The Internet Protocol IPv6 Transport Layer Protocols Internet Routing Protocols Multicast Routing DHCP, NAT, and Mobile IP

Chapter 8 Communication Networks and Services
The TCP/IP Architecture

Why Internetworking?
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To build a “network of networks” or internet
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operating over multiple, coexisting, different network technologies providing ubiquitous connectivity through IP packet transfer achieving huge economies of scale
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Why Internetworking?
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To provide universal communication services
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independent of underlying network technologies providing common interface to user applications

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Reliable Stream Service
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User Datagram Service

Why Internetworking?
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To provide distributed applications
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Any application designed to operate based on Internet communication services immediately operates across the entire Internet Rapid deployment of new applications  Email, WWW, Peer-to-peer

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Applications independent of network technology
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New networks can be introduced below Old network technologies can be retired

Internet Protocol Approach
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IP packets transfer information across Internet Host A IP → router→ router…→ router→ Host B IP IP layer in each router determines next hop (router) Network interfaces transfer IP packets across networks
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Internet Layer Network Interface

Host A
Transport Layer Internet Layer Network Interface

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Host B
Transport Layer Internet Layer
Network Interface

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Internet Layer

Network Interface

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Network