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Question 1:
A network administrator is trying to add network redundancy for the server farm. Which of the following can the network administrator configure to BEST provide this capability?
A. VRRP
B. DNS
C. UPS
D. RPO
Correct Answer: A
VRRP is an open standard protocol, which is used to provide redundancy in a network. It is a network layer protocol (protocol number-112). The number of routers (group members) in a group acts as a virtual logical router which will be the default gateway of all the local hosts. If one router goes down, one of the other group members can take place for the responsibilities for forwarding the traffic.
Question 2:
An IT officer is installing a new WAP. Which of the following must the officer change to conned users securely to the WAP?
A. AES encryption
B. Channel to the highest frequency within the band
C. TKIP encryption protocol
D. Dynamic selection of the frequency
Correct Answer: A
To connect users securely to the new WAP, the IT officer must change the encryption protocol to AES.
WAP (Wireless Access Point) provides wireless connectivity to devices in a network. Security is essential for wireless networks as wireless signals can be intercepted by unauthorized parties. Therefore, encryption is required to secure wireless communications. There are two encryption protocols used in wireless networks, which are TKIP (Temporal Key Integrity Protocol) and AES (Advanced Encryption Standard). AES is considered more secure than TKIP and is recommended for use.
The frequency channel and selection are essential to ensure the performance of the wireless network. The highest frequency within the band is not always the best choice for a particular location, as other factors like interference and congestion can affect performance. Dynamic frequency selection can help in selecting the optimal frequency to use. However, it is not related to securing the wireless network.
Question 3:
A technician receives feedback that some users are experiencing high amounts of jitter while using the wireless network. While troubleshooting the network, the technician uses the ping command with the IP address of the default gateway and verifies large variations in latency. The technician thinks the issue may be interference from other networks and non-802.11 devices. Which of the following tools should the technician use to troubleshoot the issue?
A. NetFlow analyzer
B. Bandwidth analyzer
C. Protocol analyzer
D. Spectrum analyzer
Correct Answer: D
A spectrum analyzer is a tool that focuses on the physical layer, which will vary based on the type of analyzer. Although vendors make these analyzers for both audio and optical signals, in most cases spectrum analyzers are used to analyze wireless or radio frequency signals. Spectrum analyzers are primarily used to identify and measure the strength of radio signals that are present in the area. They can visually display these signals by frequency on the device. These devices are used to locate sources of interference that may impact the operation of a wireless network.
Question 4:
An on-call network technician receives an automated email alert stating that a power supply on a firewall has just powered down. Which of the following protocols would BEST allow for this level of detailed device monitoring?
A. TFTP
B. TLS
C. SSL
D. SNMP
Correct Answer: D
Question 5:
A Chief Information Officer (CIO) wants to control the category of sites that employees access when using the Internet web browser. This objective must be achieved to be compliant with corporate policy and avoid some security and legal risks. Which of the following devices would BEST accomplish this task? (Choose two.)
A. IDS
B. Proxy server
C. Content filter
D. Virtual firewall
E. Hypervisor
F. Load balancer
Correct Answer: BC
Question 6:
A technician is contracted to install a redundant cluster of devices from the ISP In case of a hardware failure within the network. Which of the following would provide the BEST redundant solution in Layer 2 devices?
A. Multiple routers
B. Multiple switches
C. Multiple firewalls
D. Multiple budges
Correct Answer: B
A switch is a device that connects devices on a network by using packet switching to receive, process and forward data to the destination device. Switches are used in most modern networks, as they are more efficient than hubs and can handle more traffic.
A redundant cluster of switches is a group of switches that are connected together in such a way that if one switch fails, the other switches will continue to operate. This provides a high level of redundancy and ensures that the network will continue to function even if there is a hardware failure.
Question 7:
A network administrator decided to use SLAAC in an extensive IPv6 deployment to alleviate IP address management. The devices were properly connected into the LAN but autoconfiguration of the IP address did not occur as expected. Which of the following should the network administrator verify?
A. The network gateway is configured to send router advertisements.
B. A DHCP server is present on the same broadcast domain as the clients.
C. The devices support dual stack on the network layer.
D. The local gateway supports anycast routing.
Correct Answer: A
SLAAC (Stateless Address Autoconfiguration) is a method for IPv6 devices to automatically configure their IP addresses based on the network prefix advertised by a router. The router sends periodic router advertisements (RAs) that contain the network prefix and other parameters for the devices to use. If the network gateway is not configured to send RAs, then SLAAC will not work. A DHCP server is not needed for SLAAC, as the devices generate their own addresses without relying on a server. Dual stack and anycast routing are not related to SLAAC.
Question 8:
According to troubleshooting methodology, which of the following should the technician do NEXT after determining the most likely probable cause of an issue?
A. Establish a plan of action to resolve the issue and identify potential effects
B. Verify full system functionality and, if applicable, implement preventive measures
C. Implement the solution or escalate as necessary
D. Test the theory to determine the cause
Correct Answer: D
Question 9:
A network administrator is looking for an out-of-band method for accessing the console ports of a company\’s network devices when working remotely. Which of the following can be deployed as a solution?
A. A hub
B. Abridge
C. A modem
D. A WAP
Correct Answer: A
Question 10:
Which of the following ports should be used to securely receive mail that is synchronized across multiple devices?
A. 25
B. 110
C. 443
D. 993
Correct Answer: D
Question 11:
A technician is troubleshooting a wireless connectivity issue in a small office located in a high-rise building. Several APs are mounted in this office. The users report that the network connections frequently disconnect and reconnect throughout the day. Which of the following is the MOST likely cause of this issue?
A. The AP association time is set too low
B. EIRP needs to be boosted
C. Channel overlap is occurring
D. The RSSI is misreported
Correct Answer: C
Channel overlap can lead to interference and disrupt wireless connectivity. In a high-rise building with multiple access points (APs), it\’s common for neighboring APs to use overlapping channels. When this happens, it can result in co-channel interference, where the APs and client devices may interfere with each other\’s signals, causing disconnects and reconnects.
Question 12:
A network technician is reviewing an upcoming project\’s requirements to implement laaS. Which of the following should the technician consider?
A. Software installation processes
B. Type of database to be installed
C. Operating system maintenance
D. Server hardware requirements
Correct Answer: D
IaaS stands for Infrastructure as a Service, which is a cloud computing model that provides virtualized computing resources such as servers, storage, and networking over the Internet. When implementing IaaS, the network technician should consider the server hardware requirements, such as CPU, RAM, disk space, and network bandwidth, that are needed to run the applications and services on the cloud. The other options are not relevant to IaaS, as they are either handled by the cloud provider or by the end-user.
References: https://www.comptia.org/blog/what-is-iaas
Question 13:
A network device is configured to send critical events to a syslog server; however, the following alerts are not being received:
1.
Severity 5 LINK-UPDOWN: Interface 1/1, changed state to down
2.
Severity 5 LINK-UPDOWN: Interface 1/3, changed state to down
Which of the following describes the reason why the events are not being received?
A. The network device is not configured to log that level to the syslog server
B. The network device was down and could not send the event
C. The syslog server is not compatible with the network device
D. The syslog server did not have the correct MIB loaded to receive the message
Correct Answer: A
The syslog severity levels are 0 (Emergency), 1 (Alert), 2 (Critical), 3 (Error), 4 (Warning), 5 (Notice/Notification), 6 (Information), and 7 (Debugging). An easy mnemonic to memorize this is “Emus Are Cute Even When In Disguise.” Because the device is set to send CRITICAL events, it will send only events that have a severity level of 2 and below. Thus, you have to configure the device to send events at severity level 5 or higher.
Question 14:
Which of the following attacks blocks access to resources by flooding that resource with invalid requests?
A. On-path attack
B. IP spoofing attack
C. DoS attack
D. DNS poisoning attack
Correct Answer: C
Question 15:
Which of the following antenna types would most likely be used in a network repeater that is housed in a central point in a home office?
A. Omnidirectional
B. Parabolic
C. High-gain
D. Patch
Correct Answer: A