Correct Answers :

[A]

Explanation :

On Linux-based systems a common host-based firewall is iptables, which replaces a previous package called ipchains. It has the ability to accept or drop packets.

Correct Answers :

[D]

Explanation :

It is possible to specify a maximum number of MAC addresses allowed on a port.

Correct Answers :

[A]

Explanation :

The user's computer is the supplicant, the access device (WAP, Dial in the server or VPN server) is the authenticator, and the RADIUS or TACACs + server is the authentication server.

Correct Answers :

[B]

Explanation :

CAT5 transmits data at speed up to 100 Mbps and specifies cable lengths up to 100 meters.

Correct Answers :

[D]

Explanation :

HTTPS is a secure form of HTTP that uses port 443.

Correct Answers :

[A]

Explanation :

Combining physical links can be done using proprietary methods, and there is also an IEEE standard for the process called 802.3ad, later replaced by 802.1ax-2008.

Correct Answers :

[A]

Explanation :

Each part of this address communicates information. The left half of the address is called the Organizationally Unique Identifier (OUI). It identifies the vendor who made the interface. The right half is called the Universally Administered Address (UAA). It will be unique for each interface made by the vendor. Together they make a globally unique MAC address.

Correct Answers :

[B]

Explanation :

In the Grandfather-Father-Son (GFS) backup scheme, three sets of backups are defined. Most often these three definitions are daily, weekly, and monthly.

Correct Answers :

[A]

Explanation :

If you create the backup using checksums (which is an option with many utilities), it will allow you to check that the data has not changed since it was made or that it has been corrupted or damaged.

Correct Answers :

[B]

Explanation :

You will need the last full backup tape and the last differential tape. Each differential tape contains all changes that occurred since the last full backup.

Correct Answers :

[C]

Explanation :

With a multimeter you can measure voltage, current, and resistance.

Correct Answers :

[A]

Explanation :

It is a balancing act to keep humidity at the right level since low humidity causes ESD and high humidity causes moisture condensation.

Correct Answers :

[B]

Explanation :

Backplanes are advantageous in that they provide data and control signal connectors for the hard drives. They also provide the interconnection for the front I/O board, power and locator buttons, and system/component status LEDs. Unfortunately, this creates a serious single point of failure because if the backplane fails, we lose communication with the servers to which it is connected.

Correct Answers :

[C]

Explanation :

The steps in order are

• Identify the problem and determine the scope.
• Establish a theory of probable cause.
• Test the theory to determine the cause.
• Establish a plan of action to resolve the problem and notify impacted users.
• Implement the solution or escalate as appropriate.
• Verify full system functionality and, if applicable, implement preventive measures.
• Perform a root cause analysis.
• Document findings, actions, and outcomes throughout the process.

Correct Answers :

[B]

Explanation :

The tracert command (traceroute in Linux and Unix) is used to trace the path of a packet through the network on routers.

Correct Answers :

[B]

Explanation :

Some of the things you can specify using this feature are the only MAC address or addresses allowed to send traffic in the port, the total number of MAC addresses that can transmit on the port, and an action to be taken when a violation occurs (either shut the port down or prevent transmissions by the guilty MAC address).

Correct Answers :

[A]

Explanation :

If the message comes with no source IP address, that means the message is coming from the local router (the default gateway of the sender). If it has a source IP address of the sender, then it is another router in the path.

Correct Answers :

[D]

Explanation :

The sudo fdisk -l command lists the partitions on a Linux system.

Correct Answers :

[A]

Explanation :

fstab (File System Table) is a file used by Linux operating systems to mount partitions on boot.

Correct Answers :

[B]

Explanation :

In Linux this handled by GRUB.