WGU C172.docx

Application Layer (7th layer) - correct answer Interacts with application programs that incorporate a communication component such as your Internet browser and email (provides user interface) Bus Topology - correct answer The computers share the media (coaxial cable) for data transmission CAT6 (category 6) - correct answer Twisted-pair cables capable of carrying up to 1000Mbps (1 gigabit) of data up to a length of 100 meters Crossover - correct answer Transmit and receive signal pairs are crossed to properly align the transmit signal on one device with the receive signal on the other device CSMA/CD - correct answer Carrier sense multiple access with collision detection is the Ethernet LAN media-access method (used to prevent collisions in wired Ethernet networks) Used in wireless networks for to reduce collisions. Data Link Layer (2nd layer) - correct answer Layer of the OSI reference model that handles error recovery, flow control (synchronization), and sequencing (controls which terminals are sending and receiving. Media access is controlled by the Data Link Layer Deterministic - correct answer Access to the network is provided at fixed time intervals Ethernet, Physical, Hardware, or Adapter Address - correct answer Other names for MAC address Firewall Protection - correct answer Used to prevent unauthorized access to your network Host Address - correct answer Same as host number Host Number - correct answer The portion of the IP address that defines the location of the networking device connected to the network; also called the host address Hotspots - correct answer A limited geographic area that provides wireless access for the public Hub - correct answer Broadcasts the data it receives to all devices connected to its ports... it is possible for network devices to pick up a data intended for a different device... considered a multiport repeater IANA - correct answer The Internet Assigned Numbers Authority is the agency that assigns IP addresses to computer networks ICMP - correct answer Internet Control Message Protocol (perform diagnostics, report errors, control the flow of data in the network) IEEE - correct answer Institute of Electrical and Electronics Engineers, one of the major standard-setting bodies for technological development Intranet - correct answer An internal network that provides file and resource sharing but ifs not accessed from the Internet IP Address - correct answer Unique 32-bit address that identifies on which network the computer is located as well as differentiates the computer from all other devices on the same network; they are logical addresses and can be found using the ipconfig/all command IP Internetwork - correct answer A network that uses IP addressing for identifying devices connected to the network ipconfig/all - correct answer Enables the MAC address information to be displayed from the command prompt ISP - correct answer Internet service provider Link Integrity Test - correct answer Protocol used to verify that a communication link between two Ethernet devices has been established Link Light - correct answer Indicates that the transmit and receive pairs are properly aligned Link Pulses - correct answer Sent by each of the connected devices via the twisted- pair cables when data is not being transmitted to indicate that the link is still up Local Area Network (LAN) - correct answer Network of users that share computer resources in a limited area MAC Address - correct answer A unique 6-byte address assigned by the vendor of the network interface card; A MAC address has two portions. The OUI is comprised of the first 6 digits and the last half is assigned by the manufacturer. Mbps - correct answer Megabits per second Mesh Topology - correct answer All networking devices are directly connected to each other (fault tolerant; stations can still communicate if some segments go down) Multiport Repeater - correct answer Another name for a hub Network Address Translation (NAT) - correct answer Translates the private IP address to a public address for routing over the Internet Network Interface Card (NIC) - correct answer The electronic hardware used to interface the computer to the network Network Layer (3rd layer) - correct answer Defines how data packets are routed in a network. Accepts outgoing messages and combines messages or segments into packets, adding a header that includes routing information (provides a logical path for data) Network Number - correct answer The portion of the IP address that defines which network the IP packet is originating from or being delivered to Organizationally Unique Identifier (OUI) - correct answer The first 3 bytes of the MAC address that identifies the manufacturer of the network hardware (ex. Network interface card has MAC address of A, the OUI is 00-00-86). OSI - correct answer Open system interconnect OSI Model - correct answer The seven layers describing network functions Overloading - correct answer Where NAT translates the home network's private IP addresses to a single public IP address Packet - correct answer Provides grouping of the information for transmission Physical Layer (1st layer) - correct answer Layer of the OSI reference model that provides the electrical and mechanical connection to the network. Describes the media that interconnects networking devices Ping - correct answer Command used to test that a device on the network is reachable (If you can't connect to a networked computer, you can use the ping command to check connectivity) Used in windows in the command window Port Address Translation (PAT) - correct answer A port number is tracked with the client computer's private address when translating to a public address Ports - correct answer The physical input/output interfaces to the networking hardware Presentation Layer (6th layer) - correct answer Layer of the OSI reference model that accepts and structures the messages for the application Protocol - correct answer Set of rules established for users to exchange information Private Addresses - correct answer IP addresses set aside for use in private intranets Range Extender - correct answer Device that relays the wireless signals from an access point or wireless router into areas with a weak signal or no signal at all RJ-45 - correct answer The 8-pin modular connector used with CAT6/5e/5 cable Service Set Identifier (SSID) - correct answer Name that is used to identify your wireless network and is used by your access point or wireless router to establish and association SSID - correct answer Service set identifier Session Layer (5th layer) - correct answer Layer of the OSI reference model that provides the control functions necessary to establish, manage, and terminate the connections (SQL and NFS technologies are on the session layer) Star Topology - correct answer The most common networking topology in today's LANs where all networking devices connect to a central switch or hub, each device connects to a central point via a point-to-point link. Each device is connected to its own port Stateful Packet Inspection (SPI) - correct answer Type of a firewall that inspects 6to4 Prefix - correct answer a technique that enables IPv6 hosts to communicate over the IPv4 Internet Access Control Lists (ACLs) - correct answer A basic form of firewall protection ACK - correct answer Acknowledgement packet AES - correct answer Advanced Encryption Standard Anycast Address - correct answer Is obtained from a list of addresses AH - correct answer Authentication Header ARIN - correct answer American Registry for Internet Numbers ARP - correct answer Address Resolution Protocol, used to map and IP address to its MAC address (the destination gets the sender's addresses from the ARP request) ARPAnet - correct answer Advanced Research Projects Agency network Brute Force Attack - correct answer Attacker uses every possible combination of characters for the password CHAP - correct answer Challenge Handshake Authentication Protocol Buffer Overflow - correct answer Happens when a program tries to put more data into a buffer than it was configured to hold CIDR - correct answer Classless interdomain routing Class A, B, C, D, and E - correct answer The five classes of IPv4 CIDR Block - correct answer The grouping of two or more class networks together; also called supernetting Classful - correct answer The IP and subnet addresses are within the same network Connection-Oriented Protocol - correct answer Establishes a network connection, manages the delivery of data, and terminates the connection DES, 3DES - correct answer Data Encryption Standard, Triple Data Encryption Standard Denial of Service (DoS) - correct answer A service is being denied to a computer, network or server Dictionary Attack - correct answer Uses known passwords and many variations (upper- and lowercase and combinations) to try to log in to your account Dif