Which of the following connectors allows a singular QSFP transceiver to have several physical connections?
A. RJ45
B. ST
C. LC
D. MPO
Show Answer
Correct Answer: D
Explanation: MPO (Multi-Fiber Push-On) connectors carry multiple optical fibers in a single connector, allowing a single QSFP transceiver with multiple transmit/receive lanes to connect several physical fiber connections. LC and ST are typically duplex/single-fiber connectors, and RJ45 is for copper Ethernet.
Question 212
A junior network administrator is auditing the company network and notices incrementing input errors on a long-range microwave interface. Which of the following is the most likely reason for the errors?
A. The parabolic signal is misaligned.
B. The omnidirectional signal is being jammed.
C. The omnidirectional signal is not strong enough to receive properly.
D. The parabolic signal uses improper routing protocols.
Show Answer
Correct Answer: A
Explanation: Long-range microwave links typically use highly directional parabolic antennas. Incrementing input errors commonly result from degraded RF reception due to antenna misalignment, which reduces signal quality and causes frame/bit errors. Omnidirectional antennas are not typically used for long-range microwave backhaul, and routing protocols do not cause physical interface input errors.
Question 213
A technician wants to experiment with NAC in a wireless environment. Which of the following NAC techniques should be implemented for wireless networking if ease of implementation is the most important factor?
A. Port security
B. EAPoL
C. 802.1X
D. MAC filtering
Show Answer
Correct Answer: D
Explanation: MAC filtering is the easiest NAC-related technique to implement in a wireless environment because it only requires maintaining an allow/deny list of device MAC addresses. While it is weak from a security standpoint due to MAC spoofing and poor scalability, the question prioritizes ease of implementation. 802.1X/EAPoL require an authentication infrastructure (typically RADIUS), making them more complex. Port security is primarily a wired switch feature, not a standard wireless NAC method.
Question 214
Which of the following is the greatest advantage of maintaining a cold DR site compared to other DR sites?
A. Redundancy
B. Availability
C. Security
D. Cost
Show Answer
Correct Answer: D
Explanation: A cold disaster recovery (DR) site has minimal or no preinstalled running infrastructure and is brought online only after a disaster. Its primary advantage over warm and hot sites is significantly lower cost. It offers less availability and longer recovery times, so redundancy, availability, and security are not its greatest advantage.
Question 215
Which of the following should a company implement in order to share a single IP address among all the employees in the office?
A. STP
B. BGP
C. PAT
D. VXLAN
Show Answer
Correct Answer: C
Explanation: PAT (Port Address Translation), also called NAT overload, allows multiple devices on a private network to share a single public IP address by translating unique source port numbers for each connection. STP prevents Layer 2 loops, BGP is an interdomain routing protocol, and VXLAN is an overlay networking technology, none of which provide IP address sharing.
Question 216
A technician is deploying new networking hardware for company branch offices. The bridge priority must be properly set. Which of the following should the technician configure?
A. Spanning tree protocol
B. Jumbo frames
C. Perimeter network
D. Port security
Show Answer
Correct Answer: A
Explanation: Bridge priority is a Spanning Tree Protocol (STP) parameter used during root bridge election. Configuring STP allows the technician to set bridge priority. Jumbo frames relate to MTU size, a perimeter network (DMZ) is a network design concept, and port security controls MAC access on switch ports.
Question 217
A network administrator upgraded the wireless access points and wants to implement a configuration that will give users higher speed and less channel overlap based on device compatibility. Which of the following will accomplish this goal?
A. 802.1X
B. MIMO
C. ESSID
D. Band steering
Show Answer
Correct Answer: D
Explanation: Band steering encourages dual-band compatible clients to connect to the 5 GHz band instead of 2.4 GHz. This provides higher throughput and reduces congestion and channel overlap on the crowded 2.4 GHz spectrum. The other options do not perform this function: 802.1X is for authentication, MIMO improves wireless performance but does not steer clients between bands, and ESSID is the network name.
Question 218
Which of the following explains what happens if a packet is lost in transit when using UDP?
A. The data link layer will recognize the error and resend the packet.
B. IP uses the TTL field to track packet hops and will resend the packet if necessary.
C. If the sender does not receive a UDP acknowledgement, the packet will be resent.
D. Some applications will recognize the loss and initiate a resend of the packet if necessary.
Show Answer
Correct Answer: D
Explanation: UDP itself provides no acknowledgments or retransmissions, and IP does not resend lost packets. Reliable delivery, if needed, must be implemented by the application or a higher-layer protocol, so some applications detect loss and retransmit as necessary.
Question 219
A network administrator installs new cabling to connect new computers and access points. After deploying the equipment, the administrator notices a few of the devices are not connecting properly. The administrator moves the devices to a different port, but it does not resolve the issue. Which of the following should the administrator verify next?
A. Power budget
B. Device requirements
C. Port status
D. Cable termination
Show Answer
Correct Answer: D
Explanation: The most likely issue is improper cable termination. The problem appeared after new cabling was installed, and moving the affected devices to different switch ports did not resolve it, making a bad port less likely. Incorrect terminations (such as bad punch-downs, reversed or split pairs) can prevent connectivity regardless of which switch port is used. Power budget primarily affects PoE devices only, and device requirements would not typically explain multiple failures immediately following new cable installation.
Question 220
While deploying a new fleet of computers on a DHCP network, a network administrator notices that new computers cannot connect to the internet. Which of the following is most likely the problem?
A. Incorrect default gateway
B. Address pool exhaustion
C. Duplicate IP address
D. Incorrect subnet mask
Show Answer
Correct Answer: B
Explanation: Because the issue affects newly deployed computers on a DHCP network, the most likely cause is that the DHCP scope has exhausted its available addresses. Existing devices continue working with their existing leases, while new devices cannot obtain valid IP configuration and therefore cannot access the network or the internet. An incorrect default gateway or subnet mask distributed by DHCP would typically affect all clients receiving that configuration, and a duplicate IP address would usually impact individual hosts rather than an entire new fleet.
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