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Digital, Intel and Xerox (DIX) group firstly deployed the Ethernet. DIX group very first created and deployed the first Ethernet LAN Specification which the IEEE used to create the IEEE 802.3 committee. It was 10Mbps network which ran on coax, then ultimately on twisted pair and fiber media. Later, the IEEE expanded the 802.3 Committee into two new committees recognized as 802.3u (Fast Ethernet) and 802.3ab (Gigabit Ethernet on category 5) and then eventually 802.3ae (10Gbps over fiber and coax). Whenever you've to design a Local Area Network (LAN), you must have to be aware of the multiple kinds of Ethernet media available to you. Well, I suggest you to use Gigabit Ethernet to each desktop and 10Gbps between switches. Because, if you combine and match up the multiple kinds of Ethernet media techniques presently obtainable, you can arise with a cost effective network solution which works great. The following table describes the IEEE 802.3 and original Ethernet Physical layer specifications.

Rollover or Rolled Ethernet cable doesn't use to connect any Ethernet connections together. While, Rollover Ethernet cable can be use to connect a workstation to a router console serial communication (corn) port and workstation to a switch console. So, Rollover or Rolled Ethernet cable used to connect a workstation to the console port of a router or switch. We can use this cable to connect HyperTerminal running PC to the Cisco hardware (router or switch)'s console. Eight wires are used in this cable to connect serial devices, but not all eight are used to send information, like in Ethernet networking. The following image describes the eight wires used in a rolled cable.

The Ethernet cable is being using on wired network. This is the most popular source of data communication between computer, routers, switches, firewalls and many other devices on a Local Area Network (LAN). In the current era, the Ethernet Cables are very common types of cables, which are being using in mostly wired network. Ethernet cable wiring is very important dialogue discussion, particularly if you have to prepare for the Cisco exams such as CCNA. Ethernet cables are actually constructed in two essential kinds known as solid and stranded. The Solid Ethernet cables is using to get enhanced communication performance and protection beside electrical interference, however stranded cables are less in performance and protection to bodily cracks and breaks making them further appropriately for travelers and portable devices. Usually Ethernet cables can sustain one or more industry standards as well as Category 5 (CAT5) and Category 6 (CAT6).

Data Link layer performs the process of combination of bits into bytes and bytes into frames. So, Data Link layer employs frames to summarize the packets which were received from the Network Layer for transmitting on a sort of media access. The function of Ethernet stations is to pass data frames between each other using a group of bits recognized as a MAC frame format. This detects errors from a Cyclic Redundancy Check (CRC) (Remember this is error detection, not error correction). The 802.3 frames and Ethernet frame are shown below. NOTE: Encapsulating a frame within a different type of frame is called tunneling.

The crossover Ethernet cable used to connect Switch to switch, Hub to hub, Host to host, Hub to switch and Router direct to host. Like straight-through cable the same four wires used in this Crossover cable. In the following image you will find, how the four wires are used in a Crossover Ethernet cable. Unlike Straight-Through Ethernet cable, here we connect pins 1 to 3 and 2 to 6 on each side of the cable.

For connecting your PC to Cisco Router or Switch using HyperTerminal, firstly you need to connect your PC to Router or Switch by using of Rollover/Rolled Ethernet cable. Now you can start Hyper-Terminal to establish a console connection and configure the device. Configure the device as I said bellow:

Here you will come to know how to make Straight-Through cable. Straight-Through Cable is a network cable that used to connect a computer to a network device such as hub, switch, routers, host to switch or hub and router to switch or hub. Below is a diagram taken from the "Cisco Networking Academy Program CCNA" of how to properly match the cable wiring when creating a straight through cable? If you hold the cable in a "U" shape the first diagram would show you the proper way to match the wires on the left side of the "U" and the second diagram would show you the proper way to match the wires on the right side of the "U". This is the easier kind of cable to wire because the left wire mapping is the same as the right.