netw203 lectu week update

netw203 lectu week update - Chapter 5 1. Osi layer :...

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Chapter 5 1. Osi layer : Network establish basic Ip address data mac ARESS DATAGRAM: ip head dist, source sement is the data frame Eacaplation as a packet moves throught software for each of the osi layer Layer 4 TCP conncect has ackment UDP no ackment Layer 3 network Includes not only IP address but also routing protocol RARD ,ICMP,IGMP Routing protocol PRIME the intilling used by routing to determiter the best path for sending a packet from 1 subnet to nother subnet RIP,OSPF ,IS-ITS, The difference betwenty osi modle and the Application: user intiates the use of a service Prestion : compresstion and / or Session :only used if tcp is used network: IP address Data link: mac adderss or logical indentfire
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Physical: Checksum : ck the sum of bits the positive used bits In IP network all network are the subnet Switch moves data packets betwenty nodes on a network The stander switch rembere the mac address associated with each node Router moves data packets bewent subnet Hierarchical : subnet to subnet to subnet Subnet affordtwo very important network consideration 1:they creat a point from security can bedeploy firewalls are subnet 2: multiple subnet means smaller indivdral Subnet which limits ( broadcasting)traffic is a 4 letter word all changes to a netwok from the technic stand point must facilitde 2 golds 2 make better use of avable bandwith 3 save money Hierarchical: class subnet to subnet isp to subnet with the company to subnet within the dept ,each are actually unique subnet
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Al ip address have two componts 1: network identifier AKA net ID 2 host identifie AKA host ID The subnet mask is ther to tell you which portisn of the ip address is the net ID /24 is class less methed for writing the subnet mask255.255.255. .0 AKA classful IP address Next hop from router to router Routing table is road atlas trying find the quickest way to get from point to another Static routes are created by an admintrator and never change Dynamic routes automicaly create by protocol and are auto update as routers go on line on off line these rutes are created by rouing protocol If using dynamic routing portorcols routing will be automact shared betwent routers in the automoumas system static routes arenever share between routers Week 4 chapter 6 Ipv4 all so know as class
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This note was uploaded on 08/27/2011 for the course CISCO NETW 203 taught by Professor Tang during the Spring '11 term at DeVry Fremont.

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netw203 lectu week update - Chapter 5 1. Osi layer :...

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