ICMP Quiz (Online) - Networkwalks Academy

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What statement is true regarding ICMP packets?

They acknowledge receipt of TCP segments

They are encapsulated within UDP datagrams

They guarantee datagram delivery

They can provide hosts with information about network problems & are encapsulated within IP datagrams

An administrator issues the command “#ping 127.0.0.1” from the command line prompt on a PC host named ATECH1. If an ICMP reply is received, what does this confirm?

PC host ATECH1 has the TCP/IP protocol stack correctly installed

PC host ATECH1 has a default gateway correctly configured

PC host ATECH1 has connectivity with a local host

PC host ATECH1 has connectivity up to Layer 5 of the OSI model

What kind of message does a PING send out to test connectivity?

Source quench

Timestamp reply

ICMP echo request

Information interrupt request

What are the Echo-request and echo-reply messages designed for?

Diagnostic Purpose

Echo Purpose

Address Purpose

Synchronization Purpose

The network administrator at ATECH issues the ”#ping 10.0.0.99” command and successfully tests connectivity to a host that has been newly connected to the network. Which protocols were used during the test?

DNS & DHCP

DHCP & ICMP

ARP & ICMP

CDP & ARP

You execute the ping command from a host, but the router does not have a path to its destination. Which of the following ICMP message types will a client receive from the router?

ICMP destination unreachable

ICMP time exceeded

ICMP redirect

ICMP echo-reply

Which statement is NOT true regarding ICMP?

ICMP provides reliable transmission of data in an IP environment

ICMP is documented in RFC 792

An ICMP echo-request message is generated by the ping command

ICMP can identify network problems

Which two fields in the ICMP header is used for identifying the intent of ICMP message?

Type and IPS

MPLS

None

Type and Code

When you use the ping command to send ICMP messages across a network, what’s the most common request/reply pair you’ll see

Echo Request and Echo Reply

Echo Off and Echo On

ICMP Request and ICMP Reply

ICMP Hold and ICMP Send

For security reasons, the Cisco network administrator needs to prevent pings into the corporate networks from hosts outside the internetwork. Using access control lists, which protocol should be blocked?

TCP

None

UDP

ICMP