Last Updated on April 6, 2022 by Admin 3

Ch15 Network Troubleshooting Exam

  1. If you are trying to login to a server and are unable to connect, which command would you use to verify network connectivity?

    • traceroute 
    • dig 
    • ifconfig 
    • ping
  2. 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
  3. Which command is used to restart the network service on Red Hat systems?

    • /etc/init.d/rc.d/network restart 
    • /etc/init.d/network resume 
    • /etc/network/interfaces restart 
    • /etc/init.d/network restart
  4. The network interface disabled using the ifdown command will remain disabled after the system restarts.

    True or False?

    • True 
    • False
  5. Which command’s output will include the ICMP sequence number field?

    • ifconfig
    • traceroute 
    • ping 
    • route
  6. You notice that the round trip time to a particular host is slowly increasing. Which command’s output has given you this information? 

    • route 
    • ping 
    • ping -Q 
    • netstat
  7. Which of the following is not a function of the netstat command?

    • View the route used by packets to reach a given destination 
    • View port information
    •  View the kernel’s routing tables 
    • View interface statistics
  8. The kernel’s routing table can be viewed using the commands ______.

    • netstat and route 
    • route and ifconfig 
    • netstat and ifconfig 
    • netstat and traceroute
  9. Which command can be used to find the ports that are listening for connections on a host?

    • netstat -a
    • netstat -s
    • netstat -l
    • netstat -z
  10. 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?

    • The eth0 interface will be disabled and the telnet session will continue 
    • 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 be terminated
  11. Which command is used to keep track of suspicious connections?

    • ifconfig 
    • netstat 
    • ping 
    • traceroute
  12. The _____ indicates the maximum number of IP routers that can route a packet.

    • Time to Live 
    • Time to Route 
    • Router Hops 
    • Time to Reach
  13. The traceroute command can be used by regular and root users.

    True or False? 

    • True 
    • False
  14. What of the following is not true about the tracepath command?

    • Discovers maximum transmission unit (MTU) along the path 
    • Sends ICMP messages 
    • Can be used only by root user 
    • Traces the path to a network host
  15. The netstat command is used to add a route to the kernel’s routing table.

    True or False?

    • True 
    • False
  16. The ifup command can read interface definitions from a file other than the default file.

    True or False?

    • True 
    • False
  17. Which of the information listed below is not shown by the ping command?

    • TTL 
    • Route to the destination 
    • Round-trip Time 
    • Packet Loss
  18. You want to switch the NIC cards of two servers currently in use. Which command will be used to disable the interfaces for this activity?

    • route down
    • nicdown 
    • ifdown 
    • ip down
  19. The ifdown command can be used to disable all configured network interfaces.

    True or False?

    • True
    • False
  20. When using the ss command which column shows the socket type?

    • Netid 
    • Local Address 
    • Send-Q 
    • Type Socket
  21. The netcat utility is only available on Debian Linux distributions

    True or False?

    • True 
    • False
  22. The ping6 command differs from the ping command how? 

    • It can only use hostnames 
    • It is only available on Red Hat Linux Distributions 
    • It uses the ICMPv6 Echo_Request protocol 
    • It requires a fully qualified domain name and the IPv6 address to work
  23. The traceroute6 command is analogous to the __________ command. 

    • traceroute -w 
    • traceroute -6 
    • ping6 
    • traceroute -i
  24. The tracepath6 command uses the sockets API to map paths to IPv6 network hosts.

    True or False?

    • True 
    • False
  25. Finding machines on the same network segment as your interface can be done with which command? 

    • ip neighbor show 
    • link show 
    • neighbor -i 
    • ip address --segment
  26. The ip link command is useful for troubleshooting OSI Layer 2 problems.

    True or False?

    • True 
    • False
  27. The ip command is different from the ifconfig command for the following reason:

    • It can perform the work of several different legacy commands 
    • It can only show virtual interfaces 
    • It doesn’t show hardware addresses by default 
    • It appears less verbose at first glance
  28. Using the -s option with the ip command will display:

    • Network interfaces that are currently slow 
    • Static interfaces only 
    • Statistics for the object referenced 
    • Supersedes all other commands used
  29. The ip command is useful for both configuration and control of network interfaces.

    True or False?

    • True 
    • False
  30. Which legacy command cannot be replaced with the ip command?

    • arp 
    • ifconfig 
    • ping
    • route