M5Q24: Type 1 Hypervisor Flashcards
You connect your network switch to a router using a straight-through Category 5e cable. The router is acting as a gateway to another network and users begin complaining that access to the other network is very slow. You test the connection by sending pings over to the new network and you notice that multiple pings are being dropped. You login to the switch and you notice the connection to the router is running at 10 Mbps Half Duplex even though the switch port and router interface support 1 Gbps Full Duplex. You check the cable and it tests good. What is the most likely cause of the problem?
A. Wrong type of cable
B. Cable is plugged into the wrong place
C. Speed and Duplex mismatch
D. Bad router
C. Speed and Duplex mismatch
Explanation: Network devices are usually set to autonegotiate the speed and duplex of a connection for the highest possible speed and duplex between the devices. Sometimes autonegotiation does not function properly, or one of the devices has a hard set speed and duplex that causes a speed/duplex mismatch on the connection. For example, one side of the connection may be set at 10 Mbps Half duplex and the other side set at 1Gbps Full duplex. A mismatch will cause very slow performance, dropped frames/packets and errors. In this scenario we have two devices that support 1Gbps Full duplex so the connection should work at that speed. Both devices should be checked to make sure there isn’t a lower speed/duplex setting that was hard set on the devices (if so change it). Otherwise, the problem could be caused by incorrect autonegotation. In that case the devices should be hard set at 1Gbps/Full duplex to correct the issue.
You receive some wireless access points and your boss tells you that he wants you power the wireless access points with a switch that supports 802.3af instead of powering them from a wall outlet. What is the feature that your boss is referring to?
A. PoE
B. STP
C. QoS
D. LACP
A. PoE
Explanation: PoE (Power over Ethernet) is a feature of PoE capable switches and PoE injectors, that allows for providing power to devices like Wireless Access Points and IP Phones over the network cabling. The IEEE standard that defines PoE is 802.3af.
You are installing a new switch and there is a need for more available bandwidth on the connection to the upstream switch. You realize that you need to bond two 1Gbps ports together to create a 2Gbps capable connection between the switches. Which protocol should you use to set this up?
A. 802.1x
B. STP
C. QoS
D. LACP
D. LACP
Explanation: LACP (Link Aggregation Control Protocol) is an open standard port bonding protocol that can be configured to bond multiple ports together between two switches. When ports are bonded together they act as a single physical link and increase the total available bandwidth between the switches.
You want to receive and monitor all the network traffic that is going out of a specific port on a switch. Which technology could you use to duplicate the traffic from one port and send it out to the port that your monitoring computer is connect to?
A. Port Bonding
B. Port Filtering
C. Port Security
D. Port Mirroring
D. Port Mirroring
Explanation: Port mirroring allows for duplicating network traffic from one port on a switch and sending it to a different destination port on a switch. There are many use cases for port mirroring, but one of the most popular use cases is to mirror a port and use packet capturing software to view and understand the Packets and Frames that are being sent out of the mirrored port.
Which technology should you use to restrict access to a switch port to only a single MAC address?
A. Port Bonding
B. Port Filtering
C. Port Security
D. Port Mirroring
C. Port Security
Explanation: Port Security is a feature of switches that allows for controlling which MAC addresses are allowed to connect specific individual switch ports. If the wrong MAC address is connected to a port that has Port Security enabled the port will be shut down. MAC Filtering is another way to restrict a network to specific MAC addresses, but it not done on a port by port basis.
Which of the following is an authentication mechanism that can be enabled on switches to prevent network access until the host/user has authenticated with the authentication server?
A. QoS
B. 802.1x
C. Port Security
D. CoS
B. 802.1x
Explanation: 802.1x is a security/authentication feature that makes switch allow only the 802.1x(EAP) traffic from the host to the authentication server. Once the host is authenticated successfully the switch will then fully open up the port so the host can communicate with the rest of the network.
As a network engineer you are being asked to help a company with their Voice over IP phone calls. They are complaining that phone calls are being dropped anytime someone starts to download files from the internet. What technology needs to be configured on the company’s network to ensure their VoIP calls get priority over other network traffic?
A. PoE
B. Port Bonding
C. MAC Fitering
D. QoS
D. QoS
Explanation: QoS (Quality of Service) is a tool for ensuring certain network traffic gets priority over other network traffic as well as reserved bandwidth during times of congestion. QoS is necessary in networks that have Voice over IP phones because VoIP calls are very sensitive to any delays, latency, jitter, packet loss, or network congestion. Using QoS for VoIP traffic ensures the VoIP calls will have enough bandwidth available and get priority over regular internet traffic.
