Cisco Networking Academyanimation

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Information about Cisco Networking Academyanimation
Education

Published on June 30, 2008

Author: skapsalakis

Source: authorstream.com

Cisco Networking Academy:  Cisco Networking Academy Semester I Module Five Cabling Review LANS and WANS Local Area Networks LANS:  Local Area Networks LANS Small Business or Homes Wide Area Networks WANS:  Wide Area Networks WANS Government University Ethernet Standards:  Ethernet Standards Cabling Advantages & Disadvantages:  Cabling Advantages & Disadvantages The length of Cable Cost factor Installation Electrical Interference Local and State Requirements Unprotected Optical Protected Optical Networking Technologies Most Widely Used:  Networking Technologies Most Widely Used Developed by Collaboration DIX Digital, Intel, Xerox Basis for IEEE 802.3u industrial specification Ethernet :  Ethernet 802.3u refers to Fast Ethernet (100 Mbps) 802.3z refers to Gigabit Ethernet over fiber 802.3ab refers to Gigabit Ethernet over UTP 10Base2 :  10Base2 Utilizes a 50-ohm Coaxial cable (Thinnet) Maximum Distance Thinnet can be run is 185 Meters Utilizes Bus Technology Utilizes BNC Connectors ( also used as video Connectors) 10Base5:  10Base5 Utilizes 50-ohm Coaxial cable ( Thicknet) Maximum Run of 500 Meters Utilizes a Bus Topology Utilizes an AUI (attachment unit interface) Connector 10BaseT:  10BaseT Utilizes Category 3,4, 5 UTP ( Unshielded Twisted Pair) cable Maximum run is 100 Meters Utilizes a Star Topology Utilizes an RJ-45 Connector 100BaseFX:  100BaseFX Utilizes category 62.5/125 Multimodal FiberOptics Maximum Run Length of 400 meters Utilizes Star Topology Uses an SC or ST Connector & Star Topology 5-4-3 Rule:  5-4-3 Rule The 5-4-3 rule states that between any two nodes on a network, there can only be a maximum of five segments connected through four repeaters, or concentrators, and only three of the five segments may contain user connections Types of Hubs:  Types of Hubs PASSIVE A connection that doesn’t modify the signal by cleaning or amplification ACTIVE A connection that provides amplification of the signal before it sent out to any port INTELLIGENT - A connection that is active with diagnostic Capabilities. Bridges:  Bridges Break up a network into smaller segments Switches and bridges operate at the Data Link layer of the OSI model When a bridge receives a frame on the network, the destination MAC Address is looked up in the bridge table to determine whether to filter, flood, or copy the frame onto another segment. Networking Switches:  Networking Switches A switch is a more sophisticated device than a bridge. Ethernet switches are popular connectivity solutions because they improve network speed, bandwidth, and performance. They also operate at much higher speeds than bridges and can support new functionality, such as virtual LANs. LAN2LAN Switch Wireless technologies:  Wireless technologies The two most common wireless technologies used for networking are RF (radio frequency) and IR (infra Red) Three of the most common wireless standards are 802.11a, 802.11b and 802.11 g Wireless Router NICs Network Interface Cards:  NICs Network Interface Cards NICS are layer two devices because each NIC Card carries a unique code called a MAC Address. NICs Control Host or client access to the Networking media A NIC is called a network adapter                                               Fig. 1. Ethernet card. From top to bottom: RJ-45, AUI, and BNC connectors Routers:  Routers For long distance communication, WANs use serial transmission If the connection is made directly to a internet service provider, (ISP) the router will be a data terminal equipment (DTE) and use a DTE serial cable However, there are occasions where the local router is required to provide the clocking rate and therefore will use a data communications equipment (DCE) cable. Remember How They Connect:  Remember How They Connect A switch to a hub A Cisco router to a switch A Cisco router to a host A host to the console port of a Cisco router A PC to a hub A bridge to a switch A PC to a PC A host to a hub A PC to the AUI of a Cisco router

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