COMP247 Lecture Notes - Lecture 4: Static Routing, Default Route, Dynamic Routing
19 Sep 2018
School
Department
Course
Professor
Document Summary
Classful addressing: 192. 168. 1. 0/24 netmask: 11111111. 11111111. 11111111. 0000000000, 255. 255. 255. 0. This is class c: 172. 31. 9. 0/27 netmask: 11111111. 11111111. 11111111. 11100000, 255. 255. 255. 224. This is (cid:374)eithe(cid:396) (cid:272)lass b o(cid:396) c, (cid:271)ut it"d (cid:271)e (cid:272)o(cid:396)(cid:396)e(cid:272)t to say it"s eithe(cid:396) of the(cid:373: 8. 7. 0. 0/16 netmask: 11111111. 11111111. 00000000. 0000000, 255. 255. 0. 0. Neither class b nor class a, but both would be correct: 126. 0. 1. 192/29 netmask: 11111111. 11111111. 11111111. 11111000, 255. 255. 255. 248. Advantages of static length subnetting: easy to configure, native ip routing understands only static length subnetting. Address resolution, where addresses differ on different layers: application: url or email addresses. Internet: ip address: data link: mac address. Internet addresses are managed by icann (internet corporation for assigned names and. Each network address must (cid:271)e u(cid:374)i(cid:395)ue, (cid:449)hi(cid:272)h is (cid:449)hy it"s assig(cid:374)ed (cid:271)y a (cid:272)e(cid:374)t(cid:396)al autho(cid:396)ity. We have a hierarchy of smaller and smaller subnets. Address allocation: human admin assigns all addresses, host itself assigns an address, used for ad-hoc networking and valid in a single network segment only, dhcp, global internet address (from icann or isp)
