Which of the following is the height of 1U of space in a server rack?

A new version of the primary operating system used by a company has been released. Due to
some significant changes in the OS, a system administrator wants to see which remotely accessible
services are enabled by default to assess the security risk prior to upgrading to the new version.
Which of the following utilities should the administrator use?

Multiple users report that an application attempting to open a file retrieved from a server reports
that the file is corrupted. Which of the following applications can be used on the server to verify file
integrity?

A server has recently been configured as a network firewall. After the firewall was configured, users
could no longer access a remote server. Which of the following, if properly configured on the firewall,
will allow users to have secure access to the remote server? (Select TWO.)

An administrator sees a message in the system console that a drive is bad in the single-volume
JBOD storage array. A few minutes later, a user calls the help desk to report an inability to read a
file from a mapped drive. Which of the following should the administrator do?

A technician has connected a previously formatted ext4 eSATA drive to a Linux server. Given the
following output:
Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes

255 heads, 63 sectors/track, 382818 cylinders, total 1953525168 sectors
Units = sectors of 1 * 512 ?512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0009f31a
Device Boot Start End Blocks Id System
/dev/sdb1 * 20481 953525168 976761560 83 Linux
Which of the following commands should the technician use to make the partition available under
/data/drive0?

A technician has completed the installation and configuration of a third email server. The technician
has configured the firewall to permit email traffic, but the mail is only being received by the two
older servers. Which of the following should the technician configure to ensure incoming email will
be processed by all three servers?

Users on multiple network segments report that they are unable to retrieve email from a server.
Which of the following commands will allow a server technician to ensure that the email service is
running on the server?

An administrator is validating disaster recovery mechanisms and wants to ensure backup data is
usable and accurate. Which of the following should the administrator do?

A user accidentally deleted a critical file. A technician tries to restore it from tape backup but
receives an error that the file does not exist on the tape. Which of the following should the technician
do FIRST?