31 Days Before Your CCNA Exam

6 31 Days Before Your CCNA ExamTable 31-2 summarizes media standards for LAN cabling.Table 31-2Media Standard, Cable Length, and BandwidthEthernet Type Bandwidth Cable Type Maximum Distance10BASE-T 10 Mbps Cat3/Cat5 UTP 100 m100BASE-TX 100 Mbps Cat5 UTP 100 m100BASE-TX 200 Mbps Cat5 UTP 100 m100BASE-FX 100 Mbps Multimode fiber 400 m100BASE-FX 200 Mbps Multimode fiber 2 km1000BASE-T 1 Gbps Cat5e UTP 100 m1000BASE-TX 1 Gbps Cat6 UTP 100 m1000BASE-SX 1 Gbps Multimode fiber 550 m1000BASE-LX 1 Gbps Single-mode fiber 2 km10GBASE-T 10 Gbps Cat6a/Cat7 UTP 100 m10GBASE-SX4 10 Gbps Multimode fiber 550 m10GBASE-LX4 10 Gbps Single-mode fiber 2 kmEnd devices are those pieces of equipment that are either the original source or the final destinationof a message. Intermediary devices connect end devices to the network to assist in getting amessage from the source end device to the destination end device.Connecting devices in a LAN is usually done with unshielded twisted-pair (UTP) cabling.Although many newer devices have an automatic crossover feature that allows you to connecteither a straight-through or crossover cable, most devices currently require you to use one or theother.Use straight-through cables for the following connections:■■■Switch to router Ethernet portComputer to switchComputer to hubUse crossover cable for the following connections:■■■■■■Switch to switchSwitch to hubHub to hubRouter to router (Ethernet ports)Computer to computerComputer to router Ethernet port