COMM 439 Lecture Notes - Lecture 20: Fault Tolerance, Frequency Analysis, Digital Signature
Document Summary
Different tiers of isp connect to others through nap (network access point) or. Higher level isps charge lower levels for using its network. Peering (tier 1 isps do not charge their counterparts for transmitting so the internet is free ) Each isp grants internet access to different types of users. Ixp running by an npo allows any isp to connect to its network. Ixp would charge connection fees, membership fees or nothing at all. Isps negotiate peering agreements with others within the ixp and exchange internet traffic. Customer premise equipment (cpe) is installed in customer locations. P2p technology to transmit data through telephone lines. Line splitter is used to separate telephone lines from data transmission and direct telephone signal to telephone system and data to dsl modems. A circuit is split into 3 channels customers carrier: 1. Higher speed simplex data channel downstream from carrier to: 3. Slower speed duplex data channel upstream from customers to.
