lecture 7 - internet

local area network (LAN)

telecommunications network that connects several IT components together within a small, usually private-owned area

backbone

network of LANs, usually limited to a single campus/building

metropolitan area network (MAN)

network of LANs or backbones limited to a single metropolitan area

wide area network (WAN)

network of MANs or backbones distinguished by no geographical boundaries

basic architecture of internet

Internet Service Provider

-Tier 1 ISP) national ISP

-Tier 2 ISP) regional ISP

-Tier 3 ISP) local ISP

Internet Exchange Point (IXP): data exchange

internet service providers (ISPs)

autonomous systems that share routing info using border gateway protocol (BGP)

peering

When separate ISPs link their networks to swap traffic on the Internet and typically do not charge each other

modem

Communications hardware device that facilitates the transmission of data

tracert command

displays the ip address of computers in route from your computer on the internet

ping

finding other computers and sends a small packet to any computer on the internet to show you how long it takes the packet to travel from your computer to the target computer and back again