QUESTION: 125

A server administrator is completing an OS installation for a new server. The administrator patches the server with the latest vendor-suggested software, configures DHCP, and verifies all network cables are properly connected in the IDF, but there is no network connectivity.
Which of the following is the MOST likely reason for the lack of connectivity?

The VLAN Is improperly configured.
The DNS configuration Is invalid.
The OS version is not compatible with the network switch vendor.
The HIDS is preventing the connection.

Answer(s): A

Explanation:

If the server administrator patches the server with the latest vendor-suggested software, configures DHCP, and verifies all network cables are properly connected in the IDF, but there is no network connectivity, then the most likely reason for the lack of connectivity is that the VLAN is improperly configured. A VLAN (Virtual Local Area Network) is a logical grouping of network devices that share the same broadcast domain and can communicate with each other without routing. If the server is assigned to a different VLAN than the DHCP server or the default gateway, it will not be able to obtain an IP address or reach other network devices. The DNS configuration is not relevant for network connectivity, as DNS only resolves names to IP addresses. The OS version is not likely to be incompatible with the network switch vendor, as most network switches use standard protocols and interfaces. The HIDS (Host-based Intrusion Detection System) is not likely to prevent the connection, as HIDS only monitors and alerts on suspicious activities on the host.

Reference:

https://www.howtogeek.com/190014/virtualization-basics-understanding-techniques-and- fundamentals/ https://www.howtogeek.com/164981/how-to-use-nslookup-to-check-domain-name- information-in-microsoft-windows/ https://www.howtogeek.com/202794/what-is-an-intrusion- detection-system-ids-and-how-does-it-work/

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QUESTION: 126

A datacenter in a remote location lost power. The power has since been restored, but one ol the servers has not come back online. After some investigation, the server is found to still be powered off.
Which of the following is the BEST method to power on the server remotely?

Crash cart
Out-of-band console
IP KVM
RDP

Answer(s): B

Explanation:

Out-of-band console is a tool that can be used to command a remote shutdown of a physical Linux server. Out-of-band console is a method of accessing a server's console through a dedicated management port or device that does not rely on the server's operating system or network connection. Out-of-band console can be used to power cycle, reboot, update firmware, monitor performance, and perform other tasks remotely even if the server is unresponsive or offline. Crash cart is a mobile unit that contains a keyboard, monitor, mouse, and other tools that can be used to troubleshoot a server on-site, but it requires physical access to the server. IP KVM (Internet Protocol Keyboard Video Mouse) switch is a hardware device that allows remote access to multiple servers using a web browser or a client software, but it requires network connectivity and may not work if the SSH connection is lost. RDP (Remote Desktop Protocol) is a protocol that allows remote access to a Windows server's graphical user interface, but it does not work on Linux servers and requires network connectivity.

Reference:

https://www.techopedia.com/definition/13623/crash-cart https://www.techopedia.com/definition/13624/kvm-switch https://www.techopedia.com/definition/3422/remote-desktop-protocol-rdp

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QUESTION: 127

Which of the following encryption methodologies would MOST likely be used to ensure encrypted data cannot be retrieved if a device is stolen?

End-to-end encryption
Encryption in transit
Encryption at rest
Public key encryption

Answer(s): C

Explanation:

Encryption at rest is a type of encryption methodology that would most likely be used to ensure encrypted data cannot be retrieved if a device is stolen. Encryption at rest is a process of encrypting stored data on a device such as a hard drive, SSD, USB flash drive, or mobile device. This way, if the device is lost or stolen, the data cannot be accessed without the encryption key or password. Encryption at rest can be implemented using software tools such as BitLocker on Windows or FileVault on Mac OS, or hardware features such as self-encrypting drives or Trusted Platform Module chips. End-to-end encryption is a type of encryption methodology that ensures encrypted data cannot be intercepted or modified by third parties during transmission over a network. Encryption in transit is a type of encryption methodology that protects encrypted data while it is moving from one location to another over a network. Public key encryption is a type of encryption algorithm that uses a pair of keys: a public key that can be shared with anyone and a private key that is kept secret by the owner.

Reference:

https://www.howtogeek.com/196541/bitlocker-101-what-it-is-how-it-works-and- how-to-use-it/ https://www.howtogeek.com/443611/how-to-encrypt-your-macs-system-drive- removable-devices-and-individual-files/ https://www.howtogeek.com/428483/what-is-end-to-end- encryption-and-why-does-it-matter/ https://www.howtogeek.com/195877/what-is-encryption-and- how-does-it-work/

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QUESTION: 128

A backup application is copying only changed files each line it runs. During a restore, however, only a single file is used.
Which of the following backup methods does this describe?

Open file
Synthetic full
Full Incremental
Full differential

Answer(s): B

Explanation:

A synthetic full backup is a backup method that describes copying only changed files each time it runs and using only a single file during a restore. A synthetic full backup is a backup approach that involves creating a new full backup by using the previous full backup and related incremental backups. This means that a backup solution does not have to transfer the full amount of data from the source machine and can synthetize the latest incremental backups with the last full backup to create a new full backup. This reduces the backup window and network bandwidth consumption. During a restore, only the latest synthetic full backup file is needed to recover the data. Open file backup is a backup method that allows backing up files that are in use or locked by applications. Full incremental backup is a backup method that involves performing a full backup first and then backing up only the changed files since the last backup. Full differential backup is a backup method that involves performing a full backup first and then backing up only the changed files since the last full backup.

Reference:

https://www.nakivo.com/blog/what-is-synthetic-backup/ https://www.howtogeek.com/192115/what-you-need-to-know-about-creating-system-image-

backups/

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