MTA Networking Fundamentals-Final Exam Review

MTA Networking Fundamentals-Final Exam Review Local Area Network (LAN) - ANSWER-two or more computers that exchange data, confined to a small geographic area usually one building. Reason organizations need networks - ANSWER-Sharing, Communication, Organization, Money Most popular Lan - ANSWER-Wired-computers and other devices are wired together using copper-based twisted-pair cables RJ45 plugs on each end. wireless access point (WAP) - ANSWER-acts as the central connecting device for the network, such as laptops, PDAs, tablet computers, micro computers VLAN- Virtual LAN - ANSWER-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 - ANSWER-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 - ANSWER-involves DMZ situated between two firewall devices, which could be black box appliances or Microsoft Internet Security. 3-leg perimeter configuration - ANSWER-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 - ANSWER-defines the physical connection of hosts in a computer network. Star topology - ANSWER-most common topology, each computer is individually wired to a central connecting device with twisted-pair cabling. Mesh topology - ANSWER-every computer connects to every other computer; no central connecting device is needed Ring Topology - ANSWER-each computer is connected to the network using a closed loop; done with coaxial cable. This is a pretty outdated concept Token Ring - ANSWER-sends data logicaly in a ring fashion, Token Ring network are physically connected in a star fashion, but logically a ring. Ethernet - ANSWER-a group of networking technologies that define how information is sent and received between network adapters, hubs, switches, and other devices. Frame - ANSWER-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 - ANSWER-defines carrier sense multiple access with collision detection or CSMA/CD 802.3 - ANSWER-10 Mbps - 10Base5 - Thick coaxial 802.3u - ANSWER-100 Mbps - 100Base-TX, 100Base-T4, 100Base-FX = TP using 2 pairs, TP using 4 pairs, Fiber optic 802.3ab - ANSWER-1000 Mbps or 1Gbps - 10GBASE-T - TWISTED PAIR 802.3Z - ANSWER-1000 Mbps or 1Gbps - 1000BASE-X - FIBER OPTIC 802.3AE - ANSWER-10Gbps - 10GBASE-SR, 10GBASE-LR, 10GBASE-ER, AND SO ON - FIBER OPTIC Client-server - ANSWER-an architecture that distributes applications between servers such as Windows Server 2008 and client computers such as Windows 7 or Windows Vista. File server - ANSWER-stores files for computers to share Print server - ANSWER-controls printers that can be connected directly to the server or are connected to the network. Messaging Server - ANSWER-email servers, but also fax, instant messaging, collaborative, and other types of messaging servers. CTI-based server - ANSWER-company's telephone system meets its computer system, PBXs, and VOIP Peer-to-Peer (P2P) - ANSWER-means each computer has an equal ability to serve data and to access data, just like any other computer on the network. OSI model - ANSWER-7 layers which house different protocols within one of several protocol suites, how data communicates occur on computer networks. Layer 1 - Physical layer - ANSWER-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 - ANSWER-establishes, maintains, and decides how transfer is accomplished over the physical layer. Think-MAC address UOM= Frames Layer 3 - Network layer - ANSWER-dedicated to routing and switching information to different networks. UOM= Packets Layer 4 - Transport Layer - ANSWER-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 - ANSWER-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 - ANSWER-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 - ANSWER-This layer is where message creation and packet creation begins. Communications subnetwork - ANSWER-the guts of OSI model transmission, consisting of layers 1 thru 3. Physical, data, network MAC - Media Access Control - ANSWER-is a unique identifier assigned to network adapters by the manufacturer, 6 octets, and written in hexadecimal. ipconfig/all - ANSWER-how you get the MAC address in the command prompt arp -a - ANSWER-command prompt that will show IP addresses and corresponding MAC addresses of remote computers. Layer 2 switch - ANSWER-Resides on the data link layer, most common type of switch used on a LAN. Hardware based and use MAC address, but security is a concern. Virtual Lan (VLAN) - ANSWER-Layer 2 switching allows VLAN to be implemented to segment the network,reduce collisions, organize the network, boost performance, and hopefully, increase security. ipconfig - ANSWER-displays IP addresses Difference between layer 2 & 3 - ANSWER-Layer 3 switches forward packets like a router, used in busy environments, and layer 2 switches forward frames like an advanced bridge. Upper layers of OSI model - ANSWER-layers 4-7, transport, session, presentation, and application, deals with protocols, compression, encryption, and session creation...