A network administrator needs to secure SNMP access with authentication and encryption.Which of the following should the administrator use?
Answer(s): A
SNMPv3 (Simple Network Management Protocol version 3) is the version that provides enhanced security features, including authentication and encryption. Unlike SNMPv1 and SNMPv2c, which use clear-text community strings and do not offer encryption, SNMPv3 ensures that SNMP traffic is encrypted and that access is authenticated using username and passwords, protecting the integrity and confidentiality of management data.
A user's desk has a workstation and an IP phone. The user is unable to browse the internet on the workstation, but the phone works.Which of the following configurations is required?
A Voice VLAN is a separate VLAN configured to prioritize voice traffic, which is commonly used for IP phones.In this scenario, the IP phone works because it's likely configured to be on the voice VLAN, which may be correctly tagged and configured for voice traffic. However, the workstation, which is not yet configured for the correct data VLAN, is unable to browse the internet.To resolve this, the workstation needs to be assigned to the data VLAN, and the network switch should be configured to allow both the voice and data VLANs to coexist on the same physical port (typically using VLAN tagging). This setup ensures that both the IP phone and the workstation can operate correctly.
A network technician is configuring the company's network 100Mbps port Layer 2 switches. The technician wants increased throughput for the uplinks between switches. The technician connects multiple redundant links between the switches.Which of the following should the technician configure?
Spanning Tree Protocol (STP) is used to prevent network loops in a Layer 2 network, especially when multiple redundant links are created between switches.When multiple links are configured for redundancy (to increase throughput and provide failover capabilities), STP ensures that there are no loops by blocking one or more of the redundant paths while keeping the network topology loop-free. STP also allows for automatic failover in case one of the links goes down, ensuring network stability and preventing broadcast storms.
Which of the following would most likely be utilized to implement encryption in transit when using HTTPS?
Answer(s): B
TLS (Transport Layer Security) is the protocol used to implement encryption in transit for HTTPS (Hypertext Transfer Protocol Secure). It ensures that data transmitted between a web browser and a server is encrypted, providing confidentiality and security. TLS is the successor to SSL (Secure Sockets Layer) and is the standard cryptographic protocol used for securing communications over a computer network, including HTTPS.
Some of the 20 employees who use the wireless network report they are unable to access network resources even though the wireless network is available. An administrator recently made the following configuration changes to the wireless DHCP server:Network: 192.168.100.0Mask: 255.255.255.240Gateway: 192.168.100.1Which of the following is the cause of this issue?
Answer(s): C
The subnet mask 255.255.255.240 allows for only 14 usable host IP addresses per subnet (since 2 IP addresses are reserved for network and broadcast addresses), but the administrator has 20 employees using the wireless network. This means that there are not enough IP addresses available within the subnet for all users to get a valid address.To accommodate 20 devices, a subnet mask of 255.255.255.224 (which provides 30 usable IP addresses) would be needed instead.
Which of the following typically uses compromised systems that become part of a bot network?
A DDoS (Distributed Denial of Service) attack typically uses compromised systems that are part of a botnet.In a DDoS attack, the attacker takes control of multiple machines (often through malware) and uses them to flood a target server or network with excessive traffic, overwhelming it and causing it to become unavailable to legitimate users. These compromised machines are part of a botnet, which is a network of infected systems that can be remotely controlled by the attacker.
Which of the following network ports is used when a client accesses an SFTP server?
SFTP (Secure File Transfer Protocol) uses port 22, which is the same port used by SSH (Secure Shell).SFTP is a secure method for transferring files over a network, and it operates over SSH to provide encrypted communication for file transfers.
Two companies successfully merged. Following the merger, a network administrator identified a connection bottleneck. The newly formed company plans to acquire a high-end 40GB switch and redesign the network from a three-tier model to a collapsed core.Which of the following should the administrator do until the new devices are acquired?
Answer(s): D
Until the new devices are acquired, link aggregation (also known as EtherChannel or LACP - Link Aggregation Control Protocol) should be implemented to combine multiple physical network links into a single logical link. This increases the available bandwidth and helps alleviate the connection bottleneck by distributing traffic across multiple links. Link aggregation allows for more efficient use of network resources and can help bridge the gap until the new high-end switch is deployed.This approach is an effective way to temporarily resolve the bandwidth issue while maintaining stability until the new infrastructure is ready.
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