31266 Lecture Notes - Lecture 7: Wireless Lan, Local Area Network, Wide Area Network
Document Summary
In this lecture we explained that: a computer network is a collection of computing devices that are connected in various ways in order to communicate and share resources. Connections between computing devices can be physical using wires-cables or wireless using radio waves or infrared signals. We compared two types of networks: local area network (lan) and wide area. Lan refers to connected computers (between two and several hundred computers) that reside in a single geographic location/limited geographic area. organisation controls the installation of the transmission media. connected computers in an office building or school. Wan refers to connected computers that are at different geographic locations. Uses transmission media from vendors that are licensed by government. We discussed and compared the wireline communication channels: twisted-pair wire: consists of strands of copper wire twisted in pairs within a plastic sheath. It is relatively inexpensive to purchase, widely available, and easy to work with: coaxial cable: a single strand of insulated copper wire.
