CS 436 IUPUI

LAN routing, hierarchical address for scalability. Broadcast networks: a single shared medium, simpler, no rout

What is a protocol? A set of rules that governs how two parties are to interact. protocol The purpose of a protocol is to provide a server to its users. Service to its user Protocols stack/layers See a protocol example protocol Horizontal Vert

Routing in packet switching networks Routing is a key function: determine a (best) path from any source to any destination There exist multiple paths Which path is best? Depend on objective: Minimize number of hops Minimize end-to-end delay Ma

Chapter 7packet-switching Chapter 5: data-link layer protocols (some protocols are nearly same for transport layer) Chapter 6: MAC sublayer (for broadcast networks). This chapter: network layer Telephony networks (i.e., circuit-switching) for str

Security and Cryptography Security: all issues which make secure communication (information transmission, two (multiple) party interaction) over insecure channels. Cryptography: the science and art of manipulating messages to make them secure. Cla

Summary 1. 2. 3. 4. 5. Network and service Application features and requirements Network functions Connection-oriented vs. connection-less Confirmed vs. unconfirmed 1. Telegraphy and message switching 2. Telephone and circuit switching 3. Computer n

Brief summary Medium Access Control Static Channelization: TDMA, FDMA,CDMA, WDMA Dynamic Scheduling reservation protocol Polling: token-ring (ring latency, token-reinsertion, frame-length) random access ALOHA, Sloted ALOHA, CSMA, CSMA-CD (

Security and Cryptography Security: all issues which make secure communication (information transmission, two (multiple) party interaction) over insecure channels. Cryptography: the science and art of manipulating messages to make them secure. Cla

What is a protocol? A set of rules that governs how two parties are to interact. protocol The purpose of a protocol is to provide a server to its users. Service to its user Protocols stack/layers See a protocol example protocol Horizontal Vert