Chapter 13

A user calls to report that a PC cannot access the internet. The network technician asks the user to issue the command ping 127.0.0.1 in a command prompt window. The user reports that the result is four positive replies. What conclusion can be drawn, based on this connectivity test?

• The PC can access the network. The problem exists beyond the local network.

• The IP address obtained from the DHCP server is correct.

• The PC can access the Internet. However, the web browser may not work.

• The TCP/IP implementation is functional.

Which command can be used to test connectivity between two devices using Echo Request and Echo Reply messages?

• netstat

• ipconfig

• icmp

• ping

What IPv6 field does a router use to determine that a packet has expired?

• TTL field

• CRC field

• Hop Limit field

• Time Exceeded field

Which protocol provides feedback from the destination host to the source host about errors in packet delivery?

• ARP

• BOOTP

• DNS

• ICMP

Which utility uses Internet Control Messaging Protocol (ICMP)?

• RIP

• DNS

• ping

• NTP

A network administrator can successfully ping the server at www.cisco.com but cannot ping the company web server located at an ISP in another city. Which tool or command would help identify the specific router where the packet was lost or delayed?

• ipconfig

• netstat

• telnet

• traceroute

Which protocol does IPv6 use to provide address resolution and dynamic address allocation information?

• ICMPv4

• NDP

• ARP

• DHCP

What message can a host send to check the uniqueness of an IPv6 address before using that address?

• Neighbor Solicitation

• ARP Request

• Echo Request

• Router Solicitation

A technician is troubleshooting a network where it is suspected that a defective node in the network path is causing packets to be dropped. The technician only has the IP address of the endpoint device and does not have any details about the intermediate devices. What Windows command can the technician use to identify the faulty node?

• tracert

• ping

• ipconfig /flushdns

• ipconfig /displaydns

A user who is unable to connect to the file server contacts the help desk. The help desk technician asks the user to ping the IP address of the default gateway that is configured on the workstation. What is the purpose of this ping command?

• to obtain a dynamic IP address from the server

• to request that the gateway forward the connection request to the file server

• to test that the host has the capability to reach hosts on other networks

• to resolve the domain name of the file server to its IP address