Chapter 12 - Advanced Linux

Stand-alone daemons are started on demand using xinetd. True or False?

False

The NetworkManager or Systemd-networkd components must be installed on a Linux system in order to configure an IP address on a network interface. True or False?

False

To test DNS configuration by resolving a host name to an IP address, which command or commands can you use? (Choose all that apply.) a. nslookup hostname b. dig hostname c. host hostname d. resolve hostname

a. nslookup hostname, b. dig hostname, c. host hostname

Which two commands can be used to modify the route table on a Linux computer? (Choose two answers.) a. route b. ipconfig c. ip d. traceroute

a. route and c. ip

You want to generate SSH keys for your user account and copy them to a remote computer to simplify future SSH authentication. What two commands can you use to perform these actions? (Choose two answers.) a. ssh-keygen b. ssh-add c. ssh-copy-id d. ssh-agent

a. ssh-keygen and c. ssh-copy-id

What are two means available to resolve a host name to the appropriate IP address? (Choose two answers.) a. DHCP b. DNS c. /etc/hosts d. /etc/resolve.conf

b. DNS and c. /etc/hosts

Which Windows program is often used to connect to a Linux server via SSH? a. SSHD b. Putty c. Rdesktop d. mstsc

b. Putty

The daemons associated with network services listen for network traffic associated with a particular . a. station b. port c. IP address d. allocation number

b. port

Which of the following can be used to provide graphical remote administration? (Choose all that apply.) a. telnet b. ssh -X c. ssh d. VNC

b. ssh -X and d. VNC

Before a computer can use a router, with what configuration information must it be provided? a. routing table b. subnet mask c. default gateway d. default router

c. default gateway

The IP address of 127.0.0.1 is also referred to as the . a. local address b. lookup address c. local host d. loopback address

d. loopback address

SSH encrypts all traffic that passes across the network, whereas telnet does not. True or False?

True

The line that configures the host name for the computer at boot time can be found in /etc/hostname. True or False?

True

Which file stores the IP addresses of the DNS servers used to resolve host names if no DNS servers are specified within the network configuration file for the network interface? a. /etc/hosts b. /etc/host.conf c. /etc/resolve d. /etc/resolv.conf

a. /etc/hosts

Which file holds the methods to be used and the order in which they will be applied for host name resolution? a. /etc/nsswitch.conf b. /etc/resolve.conf c. /etc/hosts d. /etc/dns.conf

a. /etc/nsswitch.conf

Which file would you modify to permanently change the IP address of a network interface on a Fedora 28 system? a. /etc/sysconfig/network-scripts/ifcfg-enp8s0 b. /etc/sysconfig/network c. /etc/netplan/50-cloud-init.yaml d. /etc/network/interfaces

a. /etc/sysconfig/network-scripts/ifcfg-enp8s0

Which of the following port numbers is associated with SSH? a. 22 b. 137 c. 49 d. 23

a. 22

Which of the following are stand-alone daemons? (Choose all that apply.) a. Apache (httpd) b. Washington University FTP (in.ftpd) c. telnet (in.telnetd) d. DNS (named)

a. Apache (httpd)

Which of the following utilities can be used to check IP configuration and test network connectivity? (Choose all that apply.) a. ifconfig b. iwconfig c. ping d. nmcli

a. ifconfig and c. ping

Which commands can be used to display TCP/IP connections on your Linux system? (Choose all that apply.) a. netstat -t b. mtr c. traceroute show d. ss -t

a. netstat -t and d. ss -t