Which of the following may occur as a consequence of using the command ifconfig? (Choose THREE correct answers.)
A. New name servers may be added to the resolver configuration.
B. Network interfaces may become active or inactive.
C. The routing table may change.
D. IP addresses may change.
E. The system's host name may change.
Which of the following lines are valid in the file /etc/hosts? (Choose TWO correct answers.)
A. 2001:db8::15 www.example.com www
B. www.example.com www 203.0.13.15
C. 203.0.113.15 www.example.com www
D. www.example.com,www 203.0.13.15,2001:db8::15
E. 2003.0.113.15,2001:db8::15 www.example.com www
Which of the following is true about IPv6?
A. With IPv6, the TCP port numbers of most services have changed.
B. IPv6 no longer supports broadcast addresses.
C. IPv4 addresses can be used without any change with IPv6.
D. IPv6 no longer supports multicast addresses.
E. For IPv6, UDP and TCP have been replaced by the Rapid Transmission Protocol RTP.
Which of the following programs can be used to determine the routing path to a given destination?
A. dig
B. netstat
C. ping
D. route
E. traceroute
Which of the following tools used for DNS debugging, reports not only the response from the name server but also details about the query?
A. dnsq
B. dig
C. hostname
D. dnslookup
E. zoneinfo
On a regular users workstation the route command takes a long time before printing out the routing table. Which of the following errors does that indicate?
A. The local routing information may be corrupted and must be re-validated using a routing protocol.
B. One of the routers in the routing table is not available which causes the automatic router failure detection mechanism (ARF-D) to wait for a timeout.
C. There may accidentally be more than one default router in which case a default router election has to be done on the network in order to choose one router as the default.
D. DNS resolution may not be working as route by default tries to resolve names of routers and destinations and may run into a timeout.
What is true regarding TCP port 23?
A. Port 23 is the well known port for the telnet service which is a plain text protocol that should no longer be used.
B. Port 23 is the well known port for the SSH service which provides secure logins.
C. Port 23 is the well known port for the rlogin service which is SSL secured by default.
D. Port 23 is the well known port for the system login services which are encrypted when the user runs the starttls command in his login shell.
What of the following can be done by the command ifconfig? (Choose TWO correct answers.)
A. Set a network interface active or inactive.
B. Specify the kernel module to be used with a network interface.
C. Allow regular users to change the network configuration of a network interface.
D. Change the netmask used on a network interface.
E. Specify which network services are available on a network interface.
What is the purpose of the nsswitch.conf file?
A. It is used to configure where the C library looks for system information such as host names and user passwords.
B. It is used to configure network protocol port numbers such as for HTTP or SMTP.
C. It is used to configure LDAP authentication services for the local system.
D. It is used to configure which network services will be turned on during the next system boot.
What is true regarding a default route?
A. The default route is always used first. When the default route is not available more specific routes are tried.
B. When a default route is set, all other routes are disabled until the default route is deleted.
C. The default route is only used if there is not a more specific route to a destination host or network.
D. Without a default route, no network communication even in directly attached networks is possible.
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