WGU C172 Network and Security Foundations| 122 Questions and Answers with complete solution
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Course
WGU C172 Network and Security Foundations
Institution
WGU C172 Network And Security Foundations
TCP/IP - Known as Transmission Control Protocol/internet protocol and is a set of protocols used to
connect network devices to each other
Application Layer (TCP/IP) - TCP/IP layer that is responsible for the communication protocols
between nodes, such as HTTP, SSH, and NTP
Transport Layer (TCP/...
WGU Network and Security -
Foundations -C172 Application Layer(7th layer) - ✔✔Interacts with application programs that incorporate a communication component such as your internet browser and email (provides user interface) Bus Topology - ✔✔The computers share the media (coaxial cable) for data transmission CAT6 (category 6) - ✔✔Twisted -pair cables capable of carrying up to 1000Mbps (1 gigabit) of data up to a length of 100 meters Crossover - ✔✔Transmit and receive signal p airs are crossed to properly align the transmit signal on one device with the receive signal on the other device CSMA/CD - ✔✔Carrier sense multiple access with collision detection is the Ethernet LAN media -access method (used to prevent collisions in wire d Ethernet networks) Used in wireless networks for to reduce collisions. Data Link Layer (2nd layer) - ✔✔Layer of the OSI reference model that handles error recovery.flow control (synchronization), and sequencing controls which terminals are sending and r eceiving. Media access is controlled (MAC) by the Data Link Layer Deterministic - ✔✔Access to the network is provided at fixed time intervals Ethernet, Physical, Hardware, or Adapter Address - ✔✔Other names for MAC address Firewall Protection - ✔✔Used t o prevent unauthorized access to your network Host Address/Number - ✔✔The portion of the IP address that defines the location of the networking device connected to the network also called the hose address Hotspots - ✔✔A limited geographic area that provi des wireless access for the public Hub - ✔✔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. Is on the Physical Layer (layer 1) IANA - ✔✔The Internet Assigned Numbers Authority is the agency that assigns IP addresses to computer networks ICMP - ✔✔Internet Control Message Protocol (preform diagnostics, report errors, control the flow of data in the network) IEEE - ✔✔Institute of Electrical and Electronics Engineers, on of the major standard -setting bodies for technological development Intranet - ✔✔An internal network the provides file and resource sharing but it's not accessed from the internet IP Address - ✔✔Unique 32 -bit address the identifies on which network the computer is located as well as differentiate the computer from all oth er devices on the same network; they are logical addresses and can be found using the ipconfig/all command IP Internetwork - ✔✔A network that uses IP addressing for identifying devices connected to the network ipconfig/all - ✔✔Enables the MAC address inf ormation to be displayed from the command prompt ISP - ✔✔Internet service provider Link Integrity Test - ✔✔Protocol used to verify that a communication link between two Ethernet devices has been established. Link Light - ✔✔Indicates that the transmit an d receive pairs are properly aligned Link Pulses - ✔✔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) - ✔✔Network of users that share compu ter resources in a limited area MAC Address - ✔✔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 - ✔✔Megabits per second Mesh Topology - ✔✔All networking devices are directly connected to each other (fault tolerant; stations can still communicate if some segments go down) Multiport Repeater - ✔✔Another name for a hub Network Address Translation (NAT) - ✔✔Translates the private IP address to a public address for routing over the internet Network Interface Card(NIC) - ✔✔The electronic hardware used to interface the computer to the network Network Layer (3rd layer) - ✔✔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 - ✔✔The portion of the IP address that defines which network the IP packet is originating from or being delivered to Organizationally Unique Identifier (OUI) - ✔✔The first 3 bytes of the MAC address the identifies the manufacturer of the network hardware ( ex. Network interface card has MAC address of 00 -00-86-15-7A, the OUI is 00 -00-86) OSI - ✔✔Open system interconnect OSI Model - ✔✔The seven layers describing network funcations overloading - ✔✔Where NAT translates the home network's private IP addresses to a single public IP address Packet - ✔✔Provides grouping of the information for transmission Physical Layer (1st layer) - ✔✔Layer of the OSI reference model that provides the electrical and mechanical connection to the network Describes the media that interconnects networking devices Ping - ✔✔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 addres s Translation (PAT) - ✔✔A port number is tracked with the client computer's private address when translating to a public address Ports - ✔✔The physical input/output interfaces to the networking hardware Presentation Layer (6th layer) - ✔✔Layer of the OSI reference model that accepts and structures the messages for the application
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