CSCI 201 Study Guide - Midterm Guide: Private Network, Ip Address, Network Address Translation
16 May 2016
School
Department
Course
Professor
Document Summary
Server = has at least one program running and can service requests from another program; client = requests service. Www = hostname; usc. edu = domain name. Dns = domain name server that is a hierarchical domain-based naming scheme to distribute names, made at usc"s isi. Resource records = every domain has a set of records associated with it, which what dns returns based on name domain name, time to live, class, type, value. Ip = a unique address that is required of all computers that communicate on a network. Public: can be seen by any computer, need for internet. Private: secured behind a firewall, need explicit access. Unable to get one = 169. 254. 0. 0 (^ all zeros go to 255) Subnet = because network addresses are so scarce, takes some bits away, masks some with 1"s or slashes (router needs a subnet mask) How many hosts in each subnet = 2^6 = 24.
