QUESTION: 105

A server administrator needs to configure a server on a network that will have no more than 30 available IP addresses.
Which of the following subnet addresses will be the MOST efficient for this network?

255.255.255.0
255.255.255.128
255.255.255.224
255.255.255.252

Answer(s): C

Explanation:

The most efficient subnet address for a network that will have no more than 30 available IP addresses is 255.255.255.224. This subnet mask corresponds to a /27 prefix length, which means that 27 bits are used for the network portion and 5 bits are used for the host portion of an IP address. With 5 bits for hosts, there are 2^5 - 2 = 30 possible host addresses per subnet, which meets the requirement. The other options are either too large or too small for the network size.

Reference:

https://www.ibm.com/cloud/learn/subnet-mask

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QUESTION: 106

A remote physical server is unable to communicate to the network through the available NICs, which were misconfigured. However, the server administrator is still able to configure the server remotely.
Which of the following connection types is the server administrator using to access the server?

Out-of-band management
Crash cart access
Virtual administrator console
Local KVM setup
RDP connection

Answer(s): A

Explanation:

The connection type that the server administrator is using to access the server remotely is out-of- band management. Out-of-band management is a method of accessing and controlling a server through a dedicated network interface or port that is separate from the regular data network. Out- of-band management allows administrators to perform tasks such as rebooting, configuring, troubleshooting, or updating a server even if the server is offline or unresponsive through the regular network. Out-of-band management can use protocols such as IPMI, iLO, DRAC, or BMC.

Reference:

https://www.ibm.com/cloud/learn/out-of-band-management

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QUESTION: 107

A system administrator has been alerted to a zero-day vulnerability that is impacting a service enabled on a server OS.
Which of the following would work BEST to limit an attacker from exploiting this vulnerability?

Installing the latest patches
Closing open ports
Enabling antivirus protection
Enabling a NIDS

Answer(s): A

Explanation:

The best way to limit an attacker from exploiting a zero-day vulnerability that is impacting a service enabled on a server OS is to install the latest patches. Patches are updates that fix bugs, improve security, or add features to software. Installing patches can help prevent attackers from exploiting known vulnerabilities that have been fixed by the software vendor. A zero-day vulnerability is a vulnerability that is unknown to the vendor or the public until it is exploited by an attacker. Therefore, installing patches as soon as they are available can reduce the window of opportunity for attackers to exploit zero-day vulnerabilities.

Reference:

https://www.ibm.com/cloud/learn/patch- management

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QUESTION: 108

A server administrator has connected a new server to the network. During testing, the administrator discovers the server is not reachable via server but can be accessed by IP address.
Which of the following steps should the server administrator take NEXT? (Select TWO).

Check the default gateway.
Check the route tables.
Check the hosts file.
Check the DNS server.
Run the ping command.
Run the tracert command

Answer(s): C,D

Explanation:

If the server is not reachable by name but can be accessed by IP address, it means that there is a problem with name resolution. The hosts file and the DNS server are both responsible for mapping hostnames to IP addresses. Therefore, the server administrator should check these two files for any errors or inconsistencies that might prevent the server from being resolved by name.

Reference:

https://www.howtogeek.com/662249/how-to-edit-the-hosts-file-on-linux/ https://www.howtogeek.com/164981/how-to-use-nslookup-to-check-domain-name-information-in- microsoft-windows/

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Free SK0-005 Exam Braindumps (page: 27)

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