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WGU D412 NETWORK ANALYTICS
TROUBLESHOOTING LAB INSTRUCTIONS
FULL SOLUTION 2026 QUESTIONS WITH
ANSWERS GRADED A+
⩥ Local Area Network. Answer: LAN ⩥ How are Local Area Networks defined?. Answer: In terms of protocol and the topology used for accessing the network. ⩥ A set of rules established for users to exchange information. Answer: Protocol ⩥ The network architecture used to interconnect the networking equipment.. Answer: Topology ⩥ What are the most common topologies for LANs?. Answer: Ring, Bus, and Star ⩥ Uses a token that is placed in the data channel and circulates around the ring.. Answer: Token Ring topology ⩥ A deterministic network. Answer: Token Ring Topology
⩥ Each station connected to the network ensures access for transmission of its messages at regular or fixed time intervals. Answer: Deterministic ⩥ What are the disadvantages of the Token Ring system?. Answer: 1. If an error changes the token pattern, it can cause the token to stop circulating. ⩥ What is a disadvantage of the Token Ring system from the troubleshooting and maintenance?. Answer: The token ring path must be temporarily broken or interrupted if a computer or any device on the network is to be removed or added to the network. ⩥ What is a solution to the troubleshooting and maintenance disadvantages of the Token Ring system?. Answer: Connect each computer or device on the network to a central token ring hub. ⩥ A device that manages the passing of the token instead of relying on individual computers to pass it.. Answer: Token ring hub ⩥ How does the token ring hub improve the network?. Answer: It improves the reliability of the network. ⩥ Topology whereas the computers share the media or coaxial cable for data transmission.. Answer: Bus topology
⩥ Topology that uses twisted-pair cables with modular plugs to connect computers and other networking devices.. Answer: Star topology ⩥ Topology whereas each device is connected to a switch or hub. Answer: Star ⩥ A switch or hub facilitates the transfer of data between networking devices in this topology. Answer: star ⩥ Transmits data to all the devices connected in the star network. Answer: hub ⩥ Also called a multiport repeater. Answer: hub ⩥ Not meant for large networks, but are still used in some smaller, slower speed LANs. Answer: hub ⩥ A transmission from a hub in a star network to all the devices in the network connected to the hub. Answer: broadcast ⩥ Stores the hardware or physical address for each device connected to its ports in a star network. Answer: switch
⩥ Sends data transmissions directly to the port of the destination device on the network. Answer: switch ⩥ The physical input/output interfaces to the networking hardware. Answer: port ⩥ Where the cables physically connect to each other or a central switch or hub. Answer: Port ⩥ Only the intended destination device on this network will see the data traffic. Answer: star ⩥ What is an advantage of the star topology?. Answer: It improves the efficiency of the available bandwidth of the network ⩥ What is an advantage of the star topology from the troubleshooting and maintenance?. Answer: A device can be removed or added without disrupting other devices on the network ⩥ All devices are connected to each other. Answer: mesh topology ⩥ What is an advantage of the mesh network?. Answer: It provides full redundancy in the network data paths
⩥ What is the OSI model meant to accelerate?. Answer: The development of new networking technologies. ⩥ What is layer 1 of the OSI model?. Answer: Physical ⩥ The layer of the OSI model that provides the electrical and mechanical connection to the network.. Answer: physical ⩥ UTP, fiber, and network interface cards are examples of which layer of the OSI model?. Answer: physicaL ⩥ What is layer 2 of the OSI model?. Answer: Data link ⩥ Layer of the OSI model that handles error recovery, flow control (synchronization), and sequencing (which terminals are sending and which are receiving). Answer: data link ⩥ Also called the media access control layer. Answer: data Link ⩥ The layer of the OSI model where the Media Access Control or MAC, addressing is defined. Answer: data lInk ⩥ Where is the Ethernet 802.3 standard defined?. Answer: In the MAC or media access control
⩥ Also called the Ethernet address. Answer: MAC or media access control ⩥ MAC addresses are an example of which layer of the OSI model?. Answer: data linK ⩥ What is layer 3 of the OSI model?. Answer: Network ⩥ layer of the OSI model that accepts outgoing messages and combines messages or segments into packets, adding a header that includes routing information.. Answer: network ⩥ Acts as the network controller. Answer: network layer of the OSI model ⩥ Internet Protocol (IP) and internetwork packet exchange (IPX) are examples of which layer of the OSI model?. Answer: networK ⩥ What is layer 4 of the OSI model?. Answer: Transport ⩥ layer of the OSI model that is concerned with message integrity between source and destination. Answer: transport
⩥ American Standard Code for Information Interchange (ASCII) and Joint Photographic Experts Group (JPEG) are examples of which layer of the OSI model?. Answer: presentatioN ⩥ What is layer 7 of the osi model?. Answer: Application ⩥ layer of the osi model that interacts with application programs that incorporate a communication component such as your internet browser and email. Answer: application ⩥ layer of the osi model that is also responsible for logging the message in, interpreting the request, and determining what information is needed to support the request. Answer: aPplication ⩥ Hypertext Transfer Protocol (HTTP) for web browsing, File Transfer Protocol (FTP) for transferring files, and Simple Mail Transfer Protocol (SMTP) for email transmission are examples of which osi model layer?. Answer: applicatioN ⩥ What is step one of the three basic steps in the process of isolating a network problem?. Answer: Is the connection to the machine down (layer 1) ⩥ What is step two of the three basic steps in the process of isolating a network problem?. Answer: Is the network down? layer 3
⩥ What is step three of the three basic steps in the process of isolating a network problem?. Answer: Is a service on a specific machine down? layer 7 ⩥ A reply from" response from a ping indicates whate?". Answer: A connection to the server is up ⩥ A request timed out" response from a ping indicates what?". Answer: the network connection is down ⩥ What is the function of the data link layer of the osi model?. Answer: to provide for the flow of data MAC addresses ⩥ What is the function of the network layer?. Answer: to provide routing decisions IP, IPX ⩥ What is the function of the transport layer of the osi model?. Answer: to ensure error free packets ⩥ What is the function of the session layer of the osi model?. Answer: to establish, manage, and terminate NFS, SQL sessions
⩥ An alternating pattern of 1s and 0s used for synchronization. Answer: The preamble of an Ethernet packet ⩥ A binary 8 bit sequence of 10101011 that indicates the start of the frame. Answer: The start frame delimiter of an Ethernet packet ⩥ The MAC address associated with the network adapter or Ethernet network interface card (NIC). Answer: The destination and source MAC addresses of an Ethernet packet ⩥ An indication of the number of bytes in the data field if this value is less than 1500, or if the number is greater than 1500, and indication of the type of data format such as IP and IPX. Answer: The length/type of the Ethernet packet frame ⩥ The variable length of data being transferred from the source to the destiontion. Answer: The data of the Ethernet packet frame ⩥ A field used to bring the total number of bytes up to the minimum of 46 if the data field is less than 46 bytes. Answer: The pad of the Ethernet packet frame ⩥ A 4 byte CRC value used for error detection. Answer: The frame check sequence of the Ethernet packet frame
⩥ What is the minimum length of the Ethernet frame from destination MAC address through the frame check sequence?. Answer: 64 bytes ⩥ a device that relays the wireless signals from an access point or wireless router into areas with a weak signal or no signal at all. Answer: range extender ⩥ Where can range extenders be used to improve connectivity?. Answer: Stores, warehouses, and public places using hotspots ⩥ a limited geopgraphic area that provides wireless access for the public. Answer: hot spot ⩥ What basic steps can help secure a wireless home network?. Answer: "1. Change the default factory password
- Change the default SSID
- Turn encryption on
- Turn off the SSID broadcast
- Enable MAC address filtering" ⩥ How should a default password on a wireless device be reset?. Answer: using a combination of alphanumeric characters
⩥ Why does the network address translation allow the outsider to only see the router IP address?. Answer: because the ip addresses of the internal networking devices are not provided on the Internet ⩥ Prevents unauthorized access to your network. Answer: a firewall ⩥ a type of firewall that inspects incoming data packets to make sure they correspond to an outgoing request. Answer: state packet inspection (SPI) ⩥ a virtual private network that establishes a secure network connection. Answer: VPN ⩥ type of connection that is encrypted. Answer: VPN connection ⩥ a technique that translates the private IP address of a computer to a public address for routing over the Internet. Answer: Network Address Translation (NAT) ⩥ a technique used by a router, where NAT translates the home's network's private IP addresses to the single public IP address assigned by the ISP. Answer: Overloading
⩥ What technique does a router use to track a port number for when a data packet is returned to a home network to idenfity which computer to deliver the packet to?. Answer: Port Address Translation (PAT) ⩥ a cable that has cross-connected TX/RX data lines. Answer: crossover ⩥ In a straight-through, how are transmit and receive signal pares aligned?. Answer: end to end ⩥ Also called an uplink port. Answer: Straight-through ports ⩥ allows the connection of a hub or switch to another hub or switch without having to use a crossover cable. Answer: an uplink port ⩥ Which devices require a cross-connect input port?. Answer: computers, printers, and routers ⩥ Which devices require a straight-through connection?. Answer: unlink connections to other switches or hubs ⩥ What does a link light on the switch or hub indcate?. Answer: that the transmit and receive pairs are properly aligned and the connected devices are comunicating
⩥ Each NIC or network interface card has a unique network address called what?. Answer: MAC address ⩥ What is the length of a MAC address?. Answer: 6 bytes or 48 bits ⩥ A MAC address is displayed in which format?. Answer: 12 hexadecimal digits ⩥ The Organizationally Unique Identifier (OUI) is which digits of the MAC address?. Answer: The first six digits ⩥ Indicates the vendor of the network interface. Answer: organizationally unique identifier OUI) ⩥ A unique value for each NIC assigned by the vendor. Answer: The last six digits of a MAC address ⩥ Also called the Ethernet address, the physical address, the hardware address, and the adapter address. Answer: MAC address ⩥ What does ipconfig/all display when entered as a command in the command mode or at the MS-DOS prompt?. Answer: MAC address
⩥ Which base are MAC addresses listed in?. Answer: hexadecimal (base-16) ⩥ Only provides the physical address for the network interface card. Answer: MAC address ⩥ A mac address does not provide what?. Answer: the network location, what LAN, or in which building, city, or country the network resides ⩥ Incorporates a unique address that identifies the computer's network. Answer: Internet Protocol (IP) ⩥ Who assigns IP network numbers?. Answer: Internet Assigned Numbers Authority (IANA) ⩥ How many bits are in an IP address?. Answer: 32 ⩥ Identifies on which network the computer is located and differentiates the computer from all other devices on the same network. Answer: IP address ⩥ How many bit parts are each IP address divided into?. Answer: four 8 bit parts
