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1. One of the NICs on the server corresponding to eth1 has a hardware issue and needs to be removed. It is NOT necessary to restart the network service for this.
True or False?
- True
- False
2. Which command is used to restart the network service on Red Hat systems?
/etc/init.d/network resume/etc/init.d/rc.d/network restart/etc/network/interfaces restart/etc/init.d/network restart
3. The network interface disabled using the ifdown command will remain disabled after the system restarts.
True or False?
- True
- False
4. Which command is used to view the kernel’s routing table?
route –lroute –Lroute –Nroute –n
5. A new default gateway has been added using the route add command. Which command can be used to verify if the route has been added correctly?
route --showtraceroute –nroute –nping –n
6. The kernel’s routing table can be viewed using the commands ______.
netstatandroutenetstatandtraceroutenetstatandifconfigrouteandifconfig
7. You just finished installing a new NIC and its driver, which command can you use to verify the interface details?
netconfigpingnetstatifconfig
8. You have an existing interface eth0 and have now added a new interface eth1. You notice that the count of RX and TX packets is 0 in the output of ifconfig. What does this indicate?
- The eth0 interface has priority over the eth1 interface
- The eth1 interface is not being used to route network traffic
- The eth1 interface has not been assigned a MAC address
- The eth1 interface has not been configured on the system
9. One of the probable reasons for an increased TX collisions count in the output of ifconfig could be _____.
- Incorrect subnet mask
- Multiple network interfaces
- Incorrect Gateway
- Network congestion
10. Which command is used to keep track of suspicious connections?
traceroutepingnetstatifconfig
11. If you are trying to login to a server and are unable to connect, which command would you use to verify network connectivity?
pingdigtracerouteifconfig
12. Which command’s output will include the ICMP sequence number field?
tracerouteroutepingifconfig
13. Which of the following is not a probable reason for the Host unreachable error?
- Network service on host machine not started
- Incorrect route configured for the default gateway
- Incorrect netmask used for the default gateway
- Incorrect username/password used for login
14. The netstat command can be run continuously in batch mode.
True or False?
- True
- False
15. Which command can be used to find the ports that are listening for connections on a host?
netstat –anetstat –lnetstat –snetstat –z
16. You notice that the round trip time to a particular host is slowly increasing. Which command’s output has given you this information?
routeping –Qnetstatping
17. You log in to a server using telnet and bring down the eth0 interface (the only configured interface) using the ifdown command. What is the result of executing ifdown?
- An error will be displayed that the eth0 interface cannot be disabled
- The eth0 interface will be disabled with a warning
- The eth0 interface will be disabled and the telnet session will continue
- The eth0 interface will be disabled and the telnet session will be terminated
18. The Linux system assigns a default IP address to a newly installed NIC.
True or False?
- True
- False
19. Which of the following is not a function of the netstat command?
- View the kernel’s routing tables
- View port information
- View interface statistics
- View the route used by packets to reach a given destination
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