CompTIA SK0-005 - CompTIA Server+ Certification Exam

A link aggregation group (LAG) is a technique that combines multiple physical network interfaces into a single logical interface. This allows for the distribution of traffic across all the interfaces in the group, increasing bandwidth and redundancy. A LAG can use different modes to balance the load, such as address hashing, dynamic, or most recently used algorithm.

Load balancing is a technique used to distribute workloads evenly across multiple servers, ensuring no single server is overwhelmed. This is especially important in environments where high availability and reliability are critical, such as when multiple servers are serving the same website. By doing so, load balancing improves the responsiveness and availability of applications or websites.

Load balancing refers to the process of distributing network or application traffic across multiple servers to ensure no single server becomes overwhelmed, thereby improving responsiveness and availability of applications or websites. In the scenario described, where four servers are set up to each serve the same website, the concept of load balancing is applied. This setup aims to distribute incoming requests evenly among the servers to maximize speed and capacity utilization while ensuring no one server is overburdened, which can lead to improved overall performance of the website. Options B, C, and D do not accurately describe the scenario of distributing traffic for the same website across multiple servers.

The most likely issue that prevents the newly added server from seeing any of the LUNs on the SAN is that a single-mode fiber cable is used in place of multimode. A single-mode fiber cable is a type of optical fiber cable that has a small core diameter and allows only one mode of light to propagate through it. A single-mode fiber cable can transmit data over long distances at high speeds, but it requires more expensive transceivers and connectors than multimode fiber cables. A multimode fiber cable is a type of optical fiber cable that has a larger core diameter and allows multiple modes of light to propagate through it. A multimode fiber cable can transmit data over short distances at lower speeds than single-mode fiber cables, but it is more compatible and cost-effective than single-mode fiber cables. If a single-mode fiber cable is used in place of multimode, it can cause signal loss, attenuation, or mismatch between the devices. References: [CompTIA Server+ Certification Exam Objectives], Domain 3.0: Storage, Objective 3.2: Given a scenario, compare and contrast various storage technologies.

When clients on a different VLAN cannot receive DHCP addresses, it’s often because there is noDHCP helper addressconfigured on the router or switch. ADHCP relay/helper addressforwards DHCP requests from clients on the VLAN to the DHCP server, which may reside on a different network.

Confirming the network has a helper address (Answer C):This should be the first step to ensure that DHCP requests from the VLAN are correctly routed to the DHCP server.

Checking client NIC speed (Option A):While important, incorrect NIC speed wouldn't affect the ability to obtain an IP address from DHCP.

Checking NTP server (Option B):Time synchronization is unrelated to DHCP issues.

Authorizing the DHCP server (Option D):This is essential for DHCP operation, but since this is an existing DHCP cluster, the helper address is more likely the issue.

CompTIA Server+ Reference:This topic is related toSK0-005 Objective 1.2: Manage server network connections.

Data in transit refers to data being transmitted over a network, and protecting it requires encryption:

SSL/TLS (A): Secure Sockets Layer (SSL) and Transport Layer Security (TLS) are encryption protocols designed specifically to protect data in transit by encrypting communication between endpoints. This is the correct answer.

SHA-512 (B): Secure Hash Algorithm (SHA) is a hashing algorithm, not an encryption method. It is used for integrity verification rather than securing data in transit.

MD5 (C): Message Digest Algorithm 5 (MD5) is another hashing function, primarily used for checksums and integrity checks, not for encrypting transmitted data.

3DES (D): Triple Data Encryption Standard (3DES) is a symmetric encryption algorithm, but it is used for data at rest rather than data in transit.

Since the question specifically asks about protecting data in transit, SSL/TLS is the correct answer.

If drive C is running out of space and there isunallocated spaceavailable on the disk, the best solution is topartition the unallocated spaceand extend drive C to include the new partition. This can be done without significant downtime and will immediately provide more space for the system.

Partition the unallocated space (Answer E):This is the simplest and least disruptive method to increase the available space on drive C.

Decreasing the page/swap file (Option A):This may free up some space but can negatively impact system performance.

Reformatting (Option B):Reformatting would result in significant downtime and data loss, making it an impractical option.

Whole disk encryption (Option C):This does not solve the issue of disk space.

Enforcing disk quotas (Option D):Disk quotas manage space usage but won’t free up space on drive C.

CompTIA Server+ Reference:This topic is covered underSK0-005 Objective 3.3: Troubleshoot common server problems.

TFTP (Trivial File Transfer Protocol) is a simple and lightweight protocol that can be used to transfer files over a network. TFTP is often used to upgrade firmware or software on network devices, such as routers, switches, or servers. TFTP can also be used to install a Type 1 hypervisor, such as VMware ESXi, on multiple hosts simultaneously12.

References = 1: How to Install VMware ESXi Type 1 Hypervisor - MatthewEaton.net(https://mattheweaton.net/posts/how-to-install-vmware-esxi-type-1-hypervisor/) 2: Explore Type 1 Hypervisors - Set Up Virtual Machines Using VirtualBox and vSphere - OpenClassrooms(https://openclassrooms.com/en/courses/7163136-set-up-virtual-machines-using-virtualbox-and-vsphere/7358546-explore-type-1-hypervisors)

The Recovery Point Objective (RPO) refers to the maximum tolerable period in which data might be lost from an IT service due to a major incident. The policy mentioned in the question highlights that data loss exceeding one hour is unacceptable, directly relating to the RPO concept. RPO is critical in disaster recovery and business continuity planning, indicating the age of the files that must be recovered from backup storage for normal operations to resume without significant losses. MTTR (Mean Time To Repair), RTO (Recovery Time Objective), and MTBF (Mean Time Between Failures) are related concepts but do not specifically address the amount of data loss that can be tolerated.

Recovery Time Objective (RTO) refers to the target time set for the recovery of IT and business activities after a disaster has struck, which includes restoring server, network, and data access. The policy requirement mentioned in the question aligns with the definition of RTO, as it specifies the maximum allowable downtime or the time within which functionality must be restored. Mean Time Between Failures (MTBF) and Mean Time To Repair (MTTR) are metrics related to the reliability and repair times of systems but do not specifically pertain to disaster recovery time frames. Recovery Point Objective (RPO) describes the acceptable amount of data loss measured in time, not the restoration of operations.

Asniffer(also known as a packet analyzer) is a tool that captures and inspects data packets traveling across the network. In this case, using a sniffer would help identify suspicious or malicious redirection of traffic, possibly caused by a man-in-the-middle attack, DNS hijacking, or malware.

Sniffer (Answer D):This tool will allow the senior administrator to inspect the network traffic and identify if and how requests to the anti-malware website are being intercepted or redirected.

Data loss prevention (Option A):DLP tools focus on preventing data leakage rather than analyzing traffic redirection.

File integrity monitor (Option B):This checks for unauthorized changes to files, which may not directly address network traffic redirection.

Port scanner (Option C):A port scanner would only identify open ports on devices, which is unrelated to the redirection issue.

CompTIA Server+ Reference:This topic is addressed underSK0-005 Objective 4.2: Explain server roles and their purposes.