Question 1

Which command sends a packet that states &#34;if you receive this packet, and it's addressed to you, please reply back&#34;?&#10;A) Nmap&#10;B) Ping&#10;C) Telnet&#10;D) Tracert

Accepted Answer

B) The ping command sends a packet that states "if you receive this packet, and it's addressed to you, please reply back." This command is used to test connectivity.

Question 2

Review the following output of the ping command. What does this output tell us about 192.168.100.4?  &#10;A) The host is not reachable from this device.&#10;B) The host is online, but not accessible from this device.&#10;C) All packets successfully reached the host.&#10;D) Some packets were able to reach the host, while others were dropped.

Accepted Answer

A) When a ping command returns with "Request timed out," that means that the host is not reachable from the device where the ping was initiated. No other information is known.

Question 3

An engineer has initiated the ping command from Cisco IOS. The command showed an output of five exclamation points (!!!!!). What does this tell the engineer?&#10;A) Some of the messages received a reply, but others timed out.&#10;B) None of the messages received a reply.&#10;C) The syntax of the command was entered incorrectly.&#10;D) All five echo messages received a reply.

Accepted Answer

D) When a Cisco IOS ping command displays an output of five exclamation points (!!!!!), this shows that all five of the echo messages that were sent received a reply.

Question 4

An engineer initiated a Cisco IOS ping and received an output of two exclamation points, one period, followed by another two exclamation points (!!.!!). What does this output tell the engineer?&#10;A) None of the echo messages received a reply.&#10;B) The third echo message is the only one to receive a reply.&#10;C) The third echo message timed out, but all the others received a reply.&#10;D) All five of the echo messages received a reply.

Accepted Answer

C) In the Cisco IOS, a period represents a timed-out ping request and exclamation point represents a successful reply. Because the third character is a period, this means that the third echo message timed out while the others were successful.

Question 5

By default, how long does the Cisco IOS ping command wait for a reply before the command considers the message to be a failure (or timeout)?&#10;A) 5 seconds&#10;B) 2 seconds&#10;C) 1 seconds&#10;D) 10 seconds

Accepted Answer

B) By default, the Cisco IOS ping command will wait 2 seconds for a reply to an echo message before considering the message to be a failure.

Question 6

A failed ping can point to which of the following potential root causes?&#10;A) IP addressing problems&#10;B) DHCP problems&#10;C) A and B&#10;D) None of the above

Accepted Answer

C) A failed ping can point to several potential root causes including IP addressing problems, DHCP problems, LAN problems, and even VLAN trunking problems.

Question 7

Which of the following troubleshooting tools uses the TTL Exceeded messages to identify routers?&#10;A) ping&#10;B) telnet&#10;C) SSH&#10;D) tracert

Accepted Answer

D) The tracert command sends messages with low TTL (Time to Live) values to make the routers send back a TTL extended message. These messages allow tracert to identify the routers.

Deck 18: Troubleshooting IPV4 Routing