Domain 5.0 Networks

Domain 5.0 Networks - A+ Study Guide: Domain 5.0: Networks...

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A+ Study Guide: Domain 5.0: Networks - Network Types Introduction: In this section, we will take a look at the various networking technologies that an A+ technician will likely run across and will be tested on the exam. Network Models: There are 2 basic network models as follows: Peer-to-Peer - A peer to peer network is one in which lacks a dedicated server and every computer acts as both a client and a server. This is a good networking solution when there are 10 or less users that are in close proximity to each other. A peer to peer network can be a security nightmare, because the people setting permissions for shared resources will typically not be overly savvy. Thus is only recommended in situations where security is not an issue. In recent years, a couple of new peer-to-peer network types have evolved including USB and firewire network connections, infrared via PDAs and cell phones , and Ad Hoc wireless connections. Client/Server - This type of network is designed to support a large Number of users and uses dedicated server(s) to accomplish this. Clients log on to the server(s) in order to run applications or obtain files. Security and permissions can be managed by 1 or more administrators which cuts down on the aforementioned less savvy users from medling with things that they shouldn't be. This type of network also allows for convenient backup services, reduces network traffic and provides a host of other services that come with the network operating system (NOS). LANs and WANs: A local area network (LAN) is a computer network that spans a relatively small area, such as a single office or office building, and typically offers high-speed communications. Most LANs are confined to a single building or group of closely located buildings. However, one LAN can be connected to other LANs over any distance via telephone lines, coaxial cable, satellite, etc. creating a WAN (discussed below). Most LANS of today utilize Ethernet and/or Wi-Fi connections. More about LAN and Ethernet technologies will be discussed in the next section titled, "Network Connections and Cabling". A wide area network (WAN) computer network that spans a relatively large geographical area. Typically, a WAN consists of two or more local-area networks (LANs). Computers connected to a wide-area network are often connected through public networks, such as the telephone system, leased lines (ISDN), satellite, microwave, or other connection method. The connected LANS can be on another in a building, or as far away as in another country. The largest WAN in existence is the Internet.
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Wireless Networking: As the name implies, wireless networks allow computers to comunicate without the use of cables. There are 2 main wi-fi standards - IEEE 802.11b and IEEE 802.11g. The main difference between the 2 standards is speed; 802.11b operates at 11mbps and 802.11g works at a speed of 54mbps. 802.11 defines two pieces of equipment, a wireless station, which is usually a PC or a Laptop with a
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Domain 5.0 Networks - A+ Study Guide: Domain 5.0: Networks...

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