MTA Networking Fundamentals 100% CORRECT

MTA Networking Fundamentals 100% CORRECTLocal Area Network (LAN) two or more computers that exchange data, confined to a small geographic area usually one building. Reason organizations need networks Sharing, Communication, Organization, Money 00:46 01:39 Most popular Lan Wired-computers and other devices are wired together using copper-based twisted-pair cables RJ45 plugs on each end. wireless access point (WAP) acts as the central connecting device for the network, such as laptops, PDAs, tablet computers, micro computers VLAN- Virtual LAN is a group of host with a common set of requirements that communicate as if they were connected together in a normal fashion on one switch, regardless of their physical location. Perimeter network aka as demilitarized zone DMZ-Small network that is set up separately from a company's private LAN and the internet. Back-to-back configuration involves DMZ situated between two firewall devices, which could be black box appliances or Microsoft Internet Security. 3-leg perimeter configuration the DMZ is usually attached to a seperate connection of the company firewall- 1 to company LAN -1 to the DMZ -1 to the Internet. Network topology defines the physical connection of hosts in a computer network. Star topology most common topology, each computer is individually wired to a central connecting device with twisted-pair cabling. Mesh topology every computer connects to every other computer; no central connecting device is needed Ring Topology each computer is connected to the network using a closed loop; done with coaxial cable. This is a pretty outdated concept 00:02 01:39 Token Ring sends data logicaly in a ring fashion, Token Ring network are physically connected in a star fashion, but logically a ring. Ethernet a group of networking technologies that define how information is sent and received between network adapters, hubs, switches, and other devices. Frame is a group of bytes packaged by a network adapter for transimission across the network, these frames are created on Layer 2 of the OSI model. IEEE Institute of Electrical and Electronics engineers 802.3 defines carrier sense multiple access with collision detection or CSMA/CD 802.3 10 Mbps - 10Base5 - Thick coaxial 802.3u 100 Mbps - 100Base-TX, 100Base-T4, 100Base-FX = TP using 2 pairs, TP using 4 pairs, Fiber optic 802.3ab 1000 Mbps or 1Gbps - 10GBASE-T - TWISTED PAIR 802.3Z 1000 Mbps or 1Gbps - 1000BASE-X - FIBER OPTIC 802.3AE 10Gbps - 10GBASE-SR, 10GBASE-LR, 10GBASE-ER, AND SO ON - FIBER OPTIC Client-server an architecture that distributes applications between servers such as Windows Server 2008 and client computers such as Windows 7 or Windows Vista. File server stores files for computers to share Print server controls printers that can be connected directly to the server or are connected to the network. Messaging Server email servers, but also fax, instant messaging, collaborative, and other types of messaging servers. CTI-based server company's telephone system meets its computer system, PBXs, and VOIP Peer-to-Peer (P2P) means each computer has an equal ability to serve data and to access data, just like any other computer on the network. OSI model 7 layers which house different protocols within one of several protocol suites, how data communicates occur on computer networks. Layer 1 - Physical layer physical and electrical medium for data transfer, includes but is not limited to cables, jacks, patch pannels, punch blocks, hubs, and MAUs. UOM=Bits Layer 2 - Data Link Layer establishes, maintains, and decides how transfer is accomplished over the physical layer. Think-MAC address UOM= Frames Layer 3 - Network layer dedicated to routing and switching information to different networks. UOM= Packets Layer 4 - Transport Layer This layer ensures error-free transmission between host through logical addressing. Inbound & outbound ports are controlled in this layer. Ports = transport layer. Layer 5 - Session Layer This layer governs the establishment, termination, synchronization of sessions within the OS over the network and between host. Think log on, log off Layer 6 - Presentation Layer This layer translates the data format from sender to receiver in the various OSes that may be used. Exp = code conversion, data compression, and file encryption. Layer 7 - Application Layer This layer is where message creation and packet creation begins. Communications subnetwork the guts of OSI model transmission, consisting of layers 1 thru 3. Physical, data, network MAC - Media Access Control is a unique identifier assigned to network adapters by the manufacturer, 6 octets, and written in hexadecimal. ipconfig/all how you get the MAC address in the command prompt arp -a command prompt that will show IP addresses