CompTIA N10-008 Practice Test - Questions Answers, Page 22

DHCP is a protocol that dynamically assigns IP addresses to devices on a network. DHCP allowsdevices to obtain an IP address automatically without manual configuration. DHCP alsosimplifies network management by reducing IP conflicts and address exhaustion.A DHCP setting is a configuration option that affects how DHCP operates on a network. DHCPsettings can be applied at different levels, such as the server, the scope, or the client. DHCPsettings can control various aspects of the IP address assignment process, such as the range,the duration, the options, and the exclusions.A DHCP reservation is a DHCP setting that assigns a specific IP address to a specific device basedon its MAC address. A DHCP reservation ensures that the device always receives the same IPaddress from the DHCP server, even if the lease expires or the device reboots. A DHCPreservation can be useful for devices that need a consistent IP address, such as servers,printers, cameras, or gaming consoles.The other options are not DHCP settings that would ensure a device gets the same IP addresseach time it is connected to the network. Scope options are DHCP settings that apply to a groupof devices within a defined range of IP addresses. Exclusion is a DHCP setting that prevents arange of IP addresses from being assigned to any device. Relay is a DHCP setting that allows adevice to forward DHCP requests from one network segment to another. Pool is a DHCP settingthat defines the available IP addresses that can be assigned to devices.Reference:CompTIA Network+ N10-008 Study Guide, Chapter 3: Network Operations, Section 3.3:Network Configuration Management, Subsection: DHCP, pp. 144-146.Professor Messer's CompTIA N10-008 Network+ Course Notes, Section 2.6: NetworkAddressing, Subsection: DHCP, p. 38.Static IP vs DHCP Reservation, The Tech Journal, May 7, 2019

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Core Layer consists of biggest, fastest, and most expensive routers with the highest model numbers and Core Layer is considered as the back bone of networks. Core Layer routers are used to merge geographically separated networks. The Core Layer routers move information on the network as fast as possible. The switches operating at core layer switches packets as fast as possible.

Asymmetrical routing is the most likely cause for the WAN instability. When two different routing protocols are used, like OSPF and EIGRP, it can cause asymmetrical routing, which results in traffic being routed differently in each direction. This can lead to instability in the WAN. A CDP neighbor change, a switching loop, or an incorrect IP address are not likely causes for WAN instability.

"Bad cables, incorrect pinouts, or bent pins: Faulty cables (with electrical characteristics preventing successful transmission) or faulty connectors (which do not properly make connections) can prevent successful data transmission at Layer 1. A bad cable could simply be an incorrect category of cable being used for a specific purpose. For example, using a Cat 5 cable (instead of a Cat 6 or higher cable) to connect two 1000BASE-TX devices would result in data corruption. Bent pins in a connector or incorrect pinouts could also cause data to become corrupted."

Multiprotocol Label Switching, or MPLS, is a networking technology that routes traffic using the shortest path based on “labels,” rather than network addresses, to handle forwarding over private wide area networks. As a scalable and protocol-independent solution, MPLS assigns labels to each data packet, controlling the path the packet follows. MPLS greatly improves the speed of traffic, so users don’t experience downtime when connected to the network.

When a user reports that internet access is not working, it is important to first determine if there have been any recent changes to the network or the user's computer that could have caused the issue. This could include changes to the network configuration, the installation of new software or hardware, or other events that could have impacted the user's ability to access the internet. By determining if anything has changed, the administrator can narrow down the possible causes of the issue and focus on addressing the most likely cause.