CompTIA Network+ Question B-41

QoS operates at which of the following OSI model layers? (Select TWO)

A. Layer 1
B. Layer 2
C. Layer 3
D. Layer 5
E. Layer 7

Correct Answer: BC

CompTIA Network+ Question B-40

An organization is moving to a new datacenter. During the move, several technicians raise concerns about a system that could potentially remove oxygen from the server room and result in suffocation. Which of the following systems are they MOST likely discussing?

A. Fire suppression
B. Mantraps at the entry
C. HVAC
D. UPS and battery backups

Correct Answer: A

Explanation:
Fire suppression systems are often deployed in server rooms to prevent a fire destroying all the I.T. equipment. Different fire suppression systems work in different
ways. Obviously a fire suppression system that sprays water onto the fire is no good for a server room as the water would do as much damage as the fire. A common fire suppression system used in server rooms is one that suppresses the fire by starving it of oxygen. One way the oxygen can be removed from the server room is to fill the server room with an inert gas such as carbon dioxide.

CompTIA Network+ Question B-38

A host has been assigned the address 169.254.0.1. This is an example of which of the following address types?

A. APIPA
B. MAC
C. Static
D. Public

Correct Answer: A

Explanation:
APIPA stands for Automatic Private IP Addressing and is a feature of Windows operating systems. When a client computer is configured to use automatic addressing (DHCP), APIPA assigns a class B IP address from 169.254.0.0 to 169.254.255.255 to the client when a DHCP server is unavailable.
When a client computer configured to use DHCP boots up, it first looks for a DHCP server to provide the client with IP address and subnet mask. If the client is unable to contact a DHCP server, it uses APIPA to automatically configure itself with an IP address from a range that has been reserved especially for Microsoft. The client also configures itself with a default class B subnet mask of 255.255.0.0. The client will use the self-configured IP address until a DHCP server becomes
available.

CompTIA Network+ Question B-37

Users connecting to an SSID appear to be unable to authenticate to the captive portal. Which of the following is the cause of this issue?

A. WPA2 security key
B. SSL certificates
C. CSMA/CA
D. RADIUS

Correct Answer: D

CompTIA Network+ Question B-35

A technician is dispatched to investigate sporadic network outages. After looking at the event logs of the network equipment, the technician finds that all of the equipment is restarting at the same time every day. Which of the following can the technician deploy to correct this issue?

A. Grounding bar
B. Rack monitoring
C. UPS
D. Air flow management
E. Surge protector

Correct Answer: C

CompTIA Network+ Question B-34

A NAC service has discovered a virus on a client laptop. In which of the following locations would the NAC service place the laptop?

A. On the DMZ network
B. On the sandbox network
C. On the honeypot
D. On the quarantine network

Correct Answer: D

CompTIA Network+ Question B-32

Which of the following wireless connection types utilize MIMO on non-overlapping channels? (Choose two.)

A. 802.11a
B. 802.11ac
C. 802.11b
D. 802.11g
E. 802.11n

Correct Answer: BE