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WGU C172 Network and Security – Foundations 2022 with complete solution

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WGU C172 Network and Security – Foundations 2022 with complete solution Protocol >>>The set of rules established for users to exchange information topology >>>The network architecture used to ... interconnect the networking equipment deterministic network >>>Each station connected to the network is ensured access for transmission of its messages at regular or fixed time intervals bus topology >>>The computers share the media (coaxial cable) for data transmission ThinNet >>>The coaxial cable used in a bus network. star topology >>>Twisted-pair cables connect the devices to a central hub or switch hub >>>A multiport repeater device used at the center of a star topology multiport repeater >>>The data it receives is broadcast and seen by all devices connected to its ports. A hub. broadcast >>>Transmission of data by a hub to all devices connected to its ports switch >>>Device used at the center of a star topology that forwards a frame it receives directly out the port associated with its destination address mesh topology >>>All networking devices are directly connected to each other, allows for full redundancy OSI model >>>The seven layers describing network functions Physical layer >>>Provides the electrical and mechanical connection to the network (cabling, NICs). 1st OSI layer Data link layer >>>Handles error recovery, flow control (synchronization), and sequencing (MAC, Ethernet). 2nd OSI layer Network layer >>>Accepts outgoing messages and combines messages or segments into packets, adding a header that includes routing information (IP, IPX). 3rd OSI layer Transport layer >>>Concerned with message integrity between source and destination (TCP, UDP). 4th OSI layer Session layer >>>Provides the control functions necessary to establish, manage, and terminate the connections (NSF, SQL). 5th OSI layer Presentation layer >>>Accepts and structures the messages for the application (ASCII, JPEG). 6th OSI layer Application layer >>>Interacts with application programs that incorporate a communication component such as your Internet browser and email (HTTP, FTP, SMTP). 7th OSI layer 3 basic steps to isolate network problem >>>Is the connection to the machine down? (layer 1) Is the network down? (layer 3) Is a service on a specific machine down? (layer 7) CSMA/CD >>>The Ethernet LAN media-access method, carrier sense multiple access with collision detection Ethernet >>>LAN protocol created in 1972 and standardized in 1980 using CSMA/CD. Frame >>>Contains the header, data, and trailer (the padding and 4-byte CRC frame check sequence) Frame header >>>Consists of the preamble, start frame delimiter, destination and source addresses, and length/type field 64 bytes >>>Minimum length of an Ethernet frame 1518 bytes >>>Maximum length of an Ethernet frame MAC address >>>A unique 6-byte/48-bit address assigned by the vendor of the network interface card displayed in 12 hex digits Organizationally unique identifier (OUI) >>>The first 3 bytes of the MAC address that identifies the manufacturer of the network hardware ipconfig /all >>>Enables the MAC address information to be displayed from the command prompt IANA >>>The agency that assigns IP addresses to computer networks IP address >>>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 Class A networks >>>Governments, very large networks. Range from 0.0.0.0 to 126.255.255.255. Example: 44.x.x.x [Show More]

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