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NEW QUESTION # 128
Which of the following protocols is widely used in large-scale enterprise networks to support complex networks with multiple routers and balance traffic load on multiple links?
- A. STP
- B. RIPv2
- C. QoS
- D. OSPF
Answer: D
NEW QUESTION # 129
Which of the following issues are present with RIPv2? (Select TWO).
- A. Unicast
- B. Adjacent neighbors
- C. Time to converge
- D. Route poisoning
- E. Maximum transmission unit
- F. Scalability
Answer: C,F
Explanation:
The disadvantages of RIP (Routing Information Protocol) include the following.
---Outdated, insecure, and slow. This is your parents' protocol. It was a thing before the Web was born.
---The more well-known problem of the 15 hop limitation in which data must travel
---Convergence time is terrible for information propagation in a network
---Metrics. It determines the number of hops from source to destination, and gives no regard to other factors when determining the best path for data to travel
---Overhead. A good example would be routing tables. These are broadcast at half-minute intervals to other routers regardless of whether the data has changed or not. It's essentially like those old cartoons where the town guard in the walled city cries out, '10 o' the clock and all is well!'.
RIPv2 introduced more security and reduced broadcast traffic, which is relevant for some available answers here.
NEW QUESTION # 130
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. Channel overlap is occurring
- B. The AP association time is set too low
- C. EIRP needs to be boosted
- D. The RSSI is misreported
Answer: C
NEW QUESTION # 131
A network technician is selecting a replacement for a damaged fiber cable that goes directly to an SFP transceiver on a network switch. Which of the following cable connectors should be used?
- A. F-type
- B. MT
- C. LC
- D. RJ45
Answer: B
NEW QUESTION # 132
A large metropolitan city is looking to standardize the ability tor police department laptops to connect to the city government's VPN The city would like a wireless solution that provides the largest coverage across the city with a minimal number of transmission towers Latency and overall bandwidth needs are not high priorities. Which of the following would BEST meet the city's needs?
- A. LTE
- B. Wi-Fi 5
- C. 5G .
- D. Wi-Fi 4
- E. Wi-Fi 6
Answer: D
NEW QUESTION # 133
A network administrator is getting reports of some internal users who cannot connect to network resources. The users slate they were able to connect last week, but not today. No changes have been configured on the network devices or server during the last few weeks. Which of the following is the MOST likely cause of the issue?
- A. The client DHCP scope is fully utilized
- B. The packet counter on the router interface is high.
- C. The captive portal is down and needs to be restarted
- D. The wired network is experiencing electrical interference
- E. SNMP traps are being received
Answer: A
NEW QUESTION # 134
A technician is checking network devices to look for opportunities to improve security Which of the following toots would BEST accomplish this task?
- A. Protocol analyzer
- B. IP scanner
- C. Wi-Fi analyzer
- D. Nmap
Answer: A
Explanation:
A protocol analyzer is a tool that can capture and analyze network traffic and identify security issues such as unauthorized devices, malicious packets, or misconfigured settings.
A Wi-Fi analyzer is a tool that can measure the signal strength, interference, and channel usage of wireless networks, but it cannot provide detailed information about network security.
Nmap and IP scanner are tools that can scan network hosts and ports for open services, vulnerabilities, or operating systems, but they cannot monitor network traffic in real time.
NEW QUESTION # 135
A network technician needs to ensure the company's external mail server can pass reverse lookup checks. Which of the following records would the technician MOST likely configure? (Choose Correct option and give explanation directly from CompTIA Network+ Study guide or documents)
- A. AAAA
- B. CNAME
- C. SPF
- D. PTR
Answer: D
Explanation:
A PTR (Pointer) record is used to map an IP address to a domain name, which is necessary for reverse lookup checks. Reverse lookup checks are performed by external mail servers to verify the identity of the sender of the email. By configuring a PTR record, the network technician can ensure that the company's external mail server can pass these checks. According to the CompTIA Network+ Study Guide, "A PTR record is used to map an IP address to a domain name, and it is often used for email authentication."
NEW QUESTION # 136
A company is deploying a SAN at headquarters and a branch office 1, 000ml (1,609km) away that we access small amounts of dat a. Which of the following types of connections would be MOST cost effective to implement?
- A. ISCSI
- B. Ethernet
- C. FC
- D. FCoE
Answer: A
Explanation:
Mike Meyers
"Internet Small Computer Systems Interface (iSCSI) is built on top of TCP/IP, enabling devices that use the SCSI protocol to communicate across existing networks using cheap, readily available hardware." Jason Dion
"iSCSI (IP Small Computer System Interface)
- Lower cost, built using Ethernet switches (<10 Gbps)
- Relies on configuration allowing jumbo frames over the network"
NEW QUESTION # 137
When accessing corporate network resources, users are required to authenticate to each application they try to access. Which of the following concepts does this BEST represent?
- A. Role-based access control
- B. Zero Trust
- C. SSO
- D. VPN
Answer: B
NEW QUESTION # 138
A security engineer is trying to determine whether an internal server was accessed by hosts on the internet. The internal server was shut down during the investigation Which of the following will the engineer review to determine whether the internal server had an unauthorized access attempt?
- A. The audit logs on the core switch
- B. The firewall logs
- C. The NetFlow statistics
- D. The server's syslog
Answer: D
NEW QUESTION # 139
A network engineer is investigating reports of poor network performance. Upon reviewing a report, the engineer finds that jitter at the office is greater than 10ms on the only WAN connection available. Which of the following would be MOST affected by this statistic?
- A. Routing table from the ISP
- B. An in-office video call with a coworker
- C. A VoIP sales call with a customer
- D. Firewall CPU processing time
Answer: C
Explanation:
A VoIP sales call with a customer would be most affected by jitter greater than 10ms on the WAN connection. Jitter is the variation in delay of packets arriving at the destination. It can cause choppy or distorted audio quality for VoIP applications, especially over WAN links that have limited bandwidth and high latency. The recommended jitter for VoIP is less than 10ms. Reference: https://www.voip-info.org/voip-jitter/
NEW QUESTION # 140
A corporate client is experiencing global system outages. The IT team has identified multiple potential underlying causes throughout the enterprise Each team member has been assigned an area to trouble shoot.
Which of the following approaches is being used?
- A. Top-to-bottom
- B. Bottom-to-top
- C. Divide-and-conquer
- D. Determine if anything changed
Answer: C
NEW QUESTION # 141
Which of the following is used to prioritize Internet usage per application and per user on the network?
- A. Administrative distance
- B. Load balance routing
- C. Bandwidth management
- D. Border Gateway Protocol
Answer: C
NEW QUESTION # 142
A packet is assigned a value to ensure it does not traverse a network indefinitely. Which of the following BEST represents this value?
- A. Planned obsolescence
- B. Zero Trust
- C. Caching
- D. Time to live
Answer: D
NEW QUESTION # 143
A network administrator is implementing OSPF on all of a company's network devices. Which of the following will MOST likely replace all the company's hubs?
- A. A Layer 3 switch
- B. A NGFW
- C. A proxy server
- D. A WLAN controller
Answer: A
Explanation:
A Layer 3 switch will likely replace all the company's hubs when implementing OSPF on all of its network devices. A Layer 3 switch combines the functionality of a traditional Layer 2 switch with the routing capabilities of a router. By implementing OSPF on a Layer 3 switch, an organization can improve network performance and reduce the risk of network congestion. Reference: Network+ Certification Study Guide, Chapter 5: Network Security
NEW QUESTION # 144
An ISP is providing Internet to a retail store and has terminated its point of connection using a standard Cat 6 pin-out Which of me following terminations should the technician use when running a cable from the ISP's port lo the front desk?
- A. SC
- B. LC
- C. F-type connector
- D. TIA/E1A-56S-B
Answer: D
Explanation:
The termination that the technician should use when running a cable from the ISP's port to the front desk is B. TIA/EIA-568-B. This is a standard pin-out for Cat 6 cables that is used for Ethernet and other network physical layers1. It specifies how to arrange the eight wires in an RJ45 connector, which is a common type of connector for network cables.
NEW QUESTION # 145
Which of the following is the MOST cost-effective alternative that provides proper cabling and supports gigabit Ethernet devices?
- A. Multimode fiber with an SC connector
- B. Cable termination using TIA/EIA-568-B
- C. Twisted cable with a minimum Cat 5e certification
- D. Twinaxial cabling using an F-type connector
Answer: A
NEW QUESTION # 146
An administrator would like to allow Windows clients from outside me office to access workstations without using third-party software. Which or the following access methods would meet this requirement?
- A. Site-to-site VPN
- B. Remote desktop gateway
- C. VNC
- D. Spit tunnel
Answer: B
NEW QUESTION # 147
A security vendor needs to add a note to the DNS to validate the ownership of a company domain before services begin. Which of the following records did the security company MOST likely ask the company to configure?
- A. TXT
- B. AAAA
- C. SRV
- D. CNAME
Answer: A
Explanation:
TXT stands for Text and is a type of DNS record that can store arbitrary text data associated with a domain name. TXT records can be used for various purposes, such as verifying the ownership of a domain, providing information about a domain, or implementing security mechanisms such as SPF (Sender Policy Framework) or DKIM (DomainKeys Identified Mail). In this scenario, the security company most likely asked the company to configure a TXT record with a specific value that can prove the ownership of the domain. AAAA stands for IPv6 Address and is a type of DNS record that maps a domain name to an IPv6 address. CNAME stands for Canonical Name and is a type of DNS record that maps an alias name to another name. SRV stands for Service and is a type of DNS record that specifies the location of a service on a network.
NEW QUESTION # 148
A technician is configuring a static IP address on a new device in a newly created subnet. The work order specifies the following requirements:
* The IP address should use the highest address available in the subnet.
* The default gateway needs to be set to 172.28.85.94.
* The subnet mask needs to be 255.255.255.224.
Which of the following addresses should the engineer apply to the device?
- A. 172.28.85.93
- B. 172.28.85.255
- C. 172.28.85.95
- D. 172.28.85.254
Answer: A
Explanation:
https://www.tunnelsup.com/subnet-calculator/
IP Address: 172.28.85.95/27
Netmask: 255.255.255.224
Network Address: 172.28.85.64
Usable Host Range: 172.28.85.65 - 172.28.85.94
Broadcast Address: 172.28.85.95
NEW QUESTION # 149
A security administrator is trying to prevent incorrect IP addresses from being assigned to clients on the network. Which of the following would MOST likely prevent this and allow the network to continue to operate?
- A. Preventing broadcast messages leaving the client network
- B. Blocking ports 67/68 on the client network
- C. Enabling port security on access ports
- D. Configuring DHCP snooping on the switch
Answer: D
Explanation:
To prevent incorrect IP addresses from being assigned to clients on the network and allow the network to continue to operate, the security administrator should consider configuring DHCP (Dynamic Host Configuration Protocol) snooping on the switch. DHCP snooping is a security feature that is used to prevent unauthorized DHCP servers from operating on a network. It works by allowing the switch to monitor and validate DHCP traffic on the network, ensuring that only legitimate DHCP messages are forwarded to clients. This can help to prevent incorrect IP addresses from being assigned to clients, as it ensures that only authorized DHCP servers are able to provide IP addresses to clients on the network.
NEW QUESTION # 150
A technician is investigating packet loss to a device that has varying data bursts throughout the day. Which of the following will the technician MOST likely configure to resolve the issue?
- A. Port mirroring
- B. Jumbo frames
- C. Duplex
- D. Flow control
Answer: D
Explanation:
Explanation
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"
NEW QUESTION # 151
An engineer needs to restrict the database servers that are in the same subnet from communicating with each other. The database servers will still need to communicate with the application servers in a different subnet. In some cases, the database servers will be clustered, and the servers will need to communicate with other cluster members. Which of the following technologies will be BEST to use to implement this filtering without creating rules?
- A. Firewalls
- B. Access control lists
- C. Private VLANs
- D. Control plane policing
Answer: C
Explanation:
"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."
NEW QUESTION # 152
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