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Networking Essay

1934 words - 8 pages

IT130 Introduction to Networking Final Exam Study Guide
These are the facts from which your exam questions will be drawn. If you know these facts, you will do well on the exam.
All models are a simplified representation of the real thing, having at least all the major functions of the real item. What constitutes a major rather than a minor function is open to opinion. Most networks use a cable known in the industry as an unshielded twisted pair (UTP), usually containing four pairs of wires that can transmit and receive data. Cabling and hubs operate at the Layer 1 (Physical) layer of the OSI model. In the command window, when the utility to show the IP address and other NIC information is ...view middle of the document...

If they both do 100BaseT, then you get 100BaseT. If the hub or switch only does 10BaseT, then the NIC does 10BaseT. This whole process is automatic. A router is any piece of hardware that forwards packets based on their destination IP addresses. The router in a Linksys home router connects internally directly to a built-in switch, which then uses the additional ports for itself. This saves the home consumer from having to purchase a separate switch to go with the home router. All routers - big and small, plain or bundled with a switch - examine packets and then send the packets to the proper destination. A router can interconnect different Layer 2 technologies. It doesn’t have to be strictly Ethernet to Ethernet or ATM to ATM. There are multiple things a tech can do in order to ensure passing the CompTIA Network+ exam. It is suggested that he obligate himself by scheduling the exam, to set a self-imposed deadline. Another idea is to set aside the right amount of study time, to make sure sufficient studying can occur. Then use that study time to study for the test. It’s just that simple. A hub sends data to all the systems that are connected to the hub. The thing that uniquely identifies every NIC is its media access control address, also known as the MAC address. All versions of Windows use ipconfig /all from the command line to determine the MAC address.

A MAC address is known as a Physical address. A NIC sends data in discrete chunks called frames, to keep any one NIC from hogging the wire. frame begins with the MAC address of the receiving NIC, followed by the MAC address of the sending NIC, followed, in turn, by the data and the FCS (Frame Check Sequence). The data in a frame is followed by a special bit of checking information called the frame check sequence, which the receiving NIC uses to verify that the data arrived correctly. An example of a MAC address is something like 00-50-56-A3-04-0C. An example of an IP address is something like 192.168.4.13. The Transport layer controls the assembly and disassembly of data. The Session layer keeps track of a system’s connections to ensure that it sends the right response to the right computer. In a bus topology, all computers connect to the network via a main line. The cable must be terminated at both ends to prevent signal reflection. Star-bus is a hybrid topology because it uses a star physical topology and a bus signal topology. Out of these topologies – bus, point-to-point, ring, and star, only star networks are fault-tolerand. Topology is the term used to describe the interconnectivity of network components. All coaxial cables have an Ohm rating. RG-59 and RG-6 both are rated at 75 Ohms. RG-59 and RG-6 are types of coaxial cable. The aptly named ring topology connects nodes with a central ring of cable. The mesh topology is, for the most part, unique to wireless networks. The LC connector is designed for duplex fiber-optic. CAT 5e is the most common cabling category used today, although...

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