- Study guides, Class notes & Summaries

This comprehensive WGU C172 Network and Security – Foundations study resource provides a full breakdown of core networking concepts tested in the Performance and Objective Assessments. It includes structured summaries, practice questions, and verified answer explanations that mirror actual exam content. Students will strengthen their understanding of IP addressing, subnetting, routing, network topologies, security controls, protocols, wireless standards, and troubleshooting. Designed for fast ...

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...

It is a network of users that share computer resources in a limited area. LAN Local Area Network LAN How are Local Area Networks defined? In terms of protocol and the topology used for accessing the network. A set of rules established for users to exchange information Protocol The network architecture used to interconnect the networking equipment. Topology What are the most common topologies for LANs? Ring, Bus, and Star Uses a token that is placed in the data channel and circulates aroun...

Which OSI(Open Systems Interconnection model) layer is related to the function of the IP protocol suite? Network Which OSI(Open Systems Interconnection model) layer is responsible for organizing how bits are passed over the physical layer between devices within the same collision domain? Data link Which OSI(Open Systems Interconnection model) layer would define the scope of a protocol that makes sure packets of data are received correctly and resends them if they are not? Transport Which p...

802.11a/Wireless-A wireless 5GHz - 54Mbps - *75ft* 802.11b/Wireless-B wireless 2.4GHz - *11Mbps* - 100-150ft 802.11g/Wireless-G 2.4GHz - *54Mbps - 150ft* 802.11ac/Wireless-AC 5GHz - *1.3Gbps* 802.11n/Wireless-N 2.4GHz - *200+Mbps* 2.4GHz Frequency ranges of 802.11G/802.11B 5GHz Frequency ranges of 802.11AC/802.11A Application Layer Layer 7 in the OSI model. Support for applications. Examples: HTTP, FTP, SMTP Presentation Layer Layer 6 in the OSI model. Protocol conversion, data translat...

Which OSI layer is related to the function of the IP protocol suite? Network Which OSI layer is responsible for organizing how bits are passed over the physical layer between devices within the same collision domain? Data link Which OSI layer would define the scope of a protocol that makes sure packets of data are received correctly and resends them if they are not? Transport Which protocol suite performs functions of OSI layer 4? TCP Which type of Ethernet cable can maintain 10Gbps transm...

PING is one of the most basic tools for testing connectivity to other hosts. It sends an internet control message protocol (ICMP) echo request to a host and listens for the reply Traceroute/tracert are used to trace the route an IP packet takes to a destination. It displays each hop (next router) in a numerical list with the hop's IP address and the time it takes to receive the packet. TRACEPATH is similar to traceroute or tracert in that it displays the path taken by a packet from its so...

PING is one of the most basic tools for testing connectivity to other hosts. It sends an internet control message protocol (ICMP) echo request to a host and listens for the reply Traceroute/tracert are used to trace the route an IP packet takes to a destination. It displays each hop (next router) in a numerical list with the hop's IP address and the time it takes to receive the packet. TRACEPATH is similar to traceroute or tracert in that it displays the path taken by a packet from its so...

NIC What functions at the data link by using a unique MAC address? Router a network device that is used to connect 2 or more network segments by performing OSI layer 3 functions like packet-forwarding responsible for implementing NAT File Server used as a shared storage for all member nodes of a LAN Layer 1 Physical Layer Layer 2 Data link layer Layer 3 Network layer Layer 4 Transport layer Layer 5 Session layer Layer 6 Presentation layer Layer 7 Application layer Physical layer prov...

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 pairs are crossed to properly align the transmit signal on one device with the ...