chapter 12, chapter 13 quiz questions, chapter 14 quiz questions
What is the Advanced Encryption Standard (AES) encryption algorithm's largest key length size? 64-bit 128-bit 192-bit 256-bit
256-bit
Each octet in an IP address represents a binary number consisting of how many bits / bytes? 4-bit 8-bit 4-byte 8-byte
8-bit
Select the command that can be used to send a small TCP/IP packet to another IP address and await a response: ping ring png ipquery
ping
What FTP command runs a shell on the local computer? ˜ # ! *
!
Select the option that, when used with the sar command, displays swap statistics: -B -b -s -q
-B
What option for the iptables command can be used to specify the default policy for a certain chain type? -P -C -p -c
-P
What option can be specified with the rpm command to identify any missing files in a package or package dependency? -v -m -V -M
-V
What option can be used with ssh to enable tunneling of X Windows information? -f -x -X -L
-X
Select the iptables option that specifies the destination address of packets for a rule: -D -L -F -d
-d
What option can be added to the netstat command in order to display network statistics? -s -a -i -p
-i
Which sar command option is used to display statistics for the processor queue? -r -c -q -v
-q
Select below the configuration file that is used to configure the BIND / DNS server: /etc/bind.conf /etc/named.conf /etc/dns.conf /etc/resolv.conf
/etc/named.conf
The sshd daemon is configured by editing what configuration file? /etc/sshd.config /etc/ssh/ssh_config /etc/ssh/sshd_config /etc/ssh.conf
/etc/ssh/sshd_config
Where are the log files for the Samba daemon located? /var/log/Samba/log /var/log/access.log /var/log/samba /var/run/samba/log
/var/log/samba
What zone configuration file contains a PTR record used to identify the loopback adapter? /var/named/named.ca /etc/named.conf /var/named/named.local /etc/named.loop
/var/named/named.local
Where is the default document root directory for the Apache web server? /usr/local/html /var/www/html /usr/share/local/html /var/html
/var/www/html
In NTP, what stratum consists of atomic devices or GPS clocks? 0 1 2 5
0
What range of ports is considered to be "well-known"? 0-1023 1024-10023 10023-24433 24434-65535
0-1023
By default, the shell on a Linux system limits the number of filehandles a program can have open to what value? 256 512 1024 2048
1024
What is the maximum number of characters that can be used in a NetBIOS name? 15 25 50 100
15
What well-known TCP port is utilized by the SMTP service? 23 25 22 110
25
What is the subnet mask for a Class B IP address? 255.0.0.0 255.255.0.0 255.255.255.0 255.255.255.255
255.255.0.0
What is the subnet mask for a Class C IP address? 255.0.0.0 255.255.0.0 255.255.255.0 255.255.255.255
255.255.255.0
What kind of servers resolve fully qualified domain names to IP addresses for a certain namespace on the Internet? DHCP NTP DNS NIS
DNS
Select the SQL statement below that can be used to delete a database: DELETE DATABASE DROP TABLE DROP DATABASE DELETE TABLE
DROP DATABASE
What directive below in Apache's httpd.conf file specifies that the index.html file in the document root directory will be sent to clients who request an HTML document? DirectoryIndex index.html DocumentRoot index.html Index index.html UseIndex index.html
DirectoryIndex index.html
When working with Sendmail, what command can be used to test SMTP support? EHLO telnet HELO smtp
HELO
What DNS resource record type is used to provide the IP address for the e-mail server for a zone? NS MX SOA CNAME
MX
After downloading an installing any shared libraries, what should be done to ensure the list of shared library directories and the list of shared libraries are updated? Check the /lib, /lib64, /usr/lib, or /usr/lib64 directories for the library. Run the ldconfig command. Run a program that uses the shared libraries. Perform a system restart.
Run ldconfig command.
If applications run into difficulties gaining resources during execution and stop functioning, restarting the process using a specific kill signal may resolve the issue. Select the proper kill signal below: SIGINT SIGQUIT SIGTERM SIGHUP
SIGHUP
What tool below was designed as a secure remote access utility that encrypts information that passes across the network? Telnet Virtual Network Computing (VNC) rlogin Secure Shell (SSH)
Secure Shell SSH
Which command below can be used at a BASH command prompt to obtain a web page? apachect1 ab curl webpage
curl
How often are sar commands scheduled to run on both Fedora 20 and Ubuntu Server 14.04? every two minutes every five hours every ten minutes every thirty days
every ten minutes
What is the most common hardware component to fail on a Linux system? Floppy drives Hard disks NICs Video cards
hard disks
An IPv6 IP address consists of 16-bit numbers in what numbering scheme? hexadecimal decimal binary octal
hexadecimal
What command can be used to view and modify the date and time within the BIOS? clock date hwclock clkmod
hwclock
What command can be used to assign a TCP/IP configuration to a NIC as well as view the current configuration of all network interfaces? ipconfig ifconf ipconf ifconfig
ifconfig
What utility in the sysstat package measures the flow of information to and from disk devices? mpstat iostat iodump drivemon
iostat
Older hardware that is malfunctioning may begin to send large amounts of information to the CPU when not in use. What is this process called? flooding hiccuping jabbering dumping
jabbering
What command can be used to view what shared libraries are required by a certain program? ldconfig ldlist ldd showlibs
ldd
What ftp command uploads the filename from the current directory on the local computer to the current directory on the remote computer, and allows the use of wildcard metacharacters to specify the filename. upload filename mput filename put filename get filename
mput filename
In order to enable IP routing on Linux at boot, what setting must be configured in /etc/sysctl.conf? net.routing.enable net.ipv4.ip_forward ipv4.routing iproute.ipv4
net.ipv4.ip_forward
After modifying the /etc/aliases file, what command must be run in order to rebuild the aliases database? alias newaliases sendmail mail
newaliases
Which command can be used to see what network services are running on your network? nmap map networkmap nm
nmap
Running background processes using what command allows you to exit your command-line shell without ending any background processes? continue noshell nokill nohup
nohup
What command can be used to see what actual time servers are being used for synchronization? ntp_query ntpq ntp ntp_info
ntp_query
What PostgreSQL command-line utility backs up PostgreSQL database settings? pg_dumpall pg_dump pg_restore pg_backup
pg_dump
IPv6 IP addresses are delimited by what character below? ; : . ,
:
How can you specify the intended DNS server to query with the dig command? &server !server @server $server
@server
The Apache daemon listens for HTTP requests on what port by default? TCP 20 TCP 25 TCP 80 TCP 110
TCP 80
If network services that are started by inetd or xinetd are in use, what can be used to provide extra security? network bootstrapper TCP wrapper IP wrapper daemon launcher
TCP wrapper
What port is used by the Network Time Protocol (NTP) for communication? TCP 20 TCP 25 UDP 69 UDP 123
UDP 123
Assistive technologies are configured using what utility on Fedora 20 in GNOME? Universal Access Accessibility Usability Access Helper
Universal Access
What file contains the DSA public key in the /etc/ssh directory? ssh_host_dsa_key ssh_host_dsa_key. pub ssh_target_dsa_key ssh_target_dsa_key.pub
ssh_host_dsa_key.pub
How many DNS servers can be configured in the /etc/resolv.conf file? two three four five
three
What is the most commonly used LAN protocol? UDP/IP IPX/SPX TCP/IP DLC
TCP-IP
What command can be used to troubleshoot routing by displaying all routers between the current computer and a remote computer? route ip traceroute route add
traceroute
In order to change the time zone of a system after installation, what command must be used? time_zone tzselect tzchange tzmod
tzselect
What command can be used to change the maximum number of file handles that can be used by a program? fhlimit pgmod fhch ulimit
ulimit
If X Windows fails to start, what command can be used to troubleshoot the issue? xstatus xwininfo xdetail xreload
xwininfo