CompTIA N10-008 Practice Test - Questions Answers, Page 35

"Use private VLANs: Also known as port isolation, creating a private VLAN is a method of restricting switch ports (now called private ports) so that they can communicate only with a particular uplink. The private VLAN usually has numerous private ports and only one uplink, which is usually connected to a router, or firewall."

Ethernet flow control is a mechanism for temporarily stopping the transmission of data on Ethernet family computer networks. The goal of this mechanism is to avoid packet loss in the presence of network congestion.

Flow control is a mechanism that allows a device to regulate the amount of data it receives from another device, ensuring that the receiving device is not overwhelmed with data. If the device experiencing packet loss is receiving large bursts of data at times when it is not able to process it quickly enough, configuring flow control could help prevent packets from being lost.

"In theory, flow control can help with situations like a host that can’t keep up with the flow of traffic. It enables the host to send an Ethernet PAUSE frame, which asks the switch to hold up for some amount of time so the host can catch its breath. If the switch can, it’ll buffer transmissions until the pause expires, and then start sending again. If the host catches up early, it can send another PAUSE frame with a delay of zero to ask the switch to resume. In practice, flow control can cause latency trouble for modern real-time applications such as VoIP, and the same needs are usually met by QoS"

SFP stands for Small Form-factor Pluggable, which is a compact, hot-swappable networkinterface module that can be used for both telecommunication and data communicationsapplications1.SFP transceivers can support different types of media and interfaces, such as copper or fibercables, and have different data rates and distances1.Depending on the type of cable used, SFP transceivers feature different connectors.Generallyspeaking, SFP, SFP+ and SFP28 modules will use either LC or RJ45 connectors, depending onwhether the cable is copper or fiber2.LC stands for Lucent Connector, which is a small form-factor fiber-optic connector that has a1.25 mm ferrule and a push-pull coupling mechanism3.LC connectors are widely used for SFPtransceivers that operate on fiber-optic cables14.RJ45 stands for Registered Jack 45, which is a standard connector for twisted pair copper cablesthat has eight pins and a modular design3.RJ45 connectors are used for SFP transceivers thatoperate on copper cables, such as 1000BASE-T SFP14.MT stands for Mechanical Transfer, which is a type of fiber-optic connector that has multiplefibers aligned in a ferrule and a pin-and-guide-hole alignment mechanism3.MT connectors areused for high-density applications, such as QSFP transceivers that operate on fiber-opticcables2.

F-type stands for Female Type, which is a coaxial cable connector that has a screw-on designand a 75-ohm impedance3.F-type connectors are used for cable television, satellite television,and other radio frequency applications3.Therefore, the correct answer is B. LC, because it is the most common connector for SFPtransceivers that operate on fiber-optic cables, which is the case in the question.1:Small Form-factor Pluggable - Wikipedia

A rogue access point is an illegitimate access point plugged into a network to create a bypass from outside into the legitimate network. By contrast, an evil twin is a copy of a legitimate access point.

The DHCP client sends broadcast request packets to the network; the DHCP servers respond with broadcast packets that offer IP parameters, such as an IP address for the client. After the client chooses the IP parameters, communication between the client and server is by unicast packets. "When a DHCP client boots up, it automatically sends out a DHCP Discover UDP datagram to the broadcast address, 255.255.255.255. This DHCP Discover message asks “Are there any DHCP servers out there?” The client can’t send unicast traffic yet, as it doesn’t have a valid IP address that can be used."