HomeICMP, Ping & Traceroute Practice Quiz SeriesICMP, Ping & TracerouteFull nameEmail addressGenderSelectMaleFemaleOtherPrefer not to sayCurrent statusSelectSchool studentCollege studentWorking professionalJob seekerTeacher/TrainerOther I agree that my details and score may be stored for quiz administration.Start QuizQuestion 1 of 25ICMP, Ping & TracerouteEasy1 mark(s)1. Which information can ping commonly help you observe?Select all correct answers.The complete routing table of every routerWhether ICMP Echo responses are receivedPacket loss across repeated probesApproximate round-trip timeThe exact application response time for every serviceICMP, Ping & TracerouteHard1 mark(s)2. A traceroute begins looping repeatedly between two router addresses until TTL expires. Which areas should be investigated?Select all correct answers.Incorrect static or dynamic route informationRouting tables on the involved routersThe DNS TXT record of the destinationThe keyboard configuration on the source hostPotential routing-loop conditionsICMP, Ping & TracerouteEasy1 mark(s)3. Which statements correctly describe ICMP?Select all correct answers.ICMP assigns Ethernet MAC addressesICMP is carried within IP packetsICMP provides reliable application data delivery like TCPPing commonly uses ICMP Echo messagesICMP supports IP-layer error reporting and diagnosticsICMP, Ping & TracerouteEasy1 mark(s)4. Which statements about ICMP Echo Request and Echo Reply are correct?Select all correct answers.ICMPv4 Echo Reply is Type 8ICMPv4 Echo Request is Type 8Echo messages establish a TCP session before testing reachabilityEcho Reply can indicate that the target responded to the requestEcho Request is commonly used by pingICMP, Ping & TracerouteMedium1 mark(s)5. Which ICMPv4 Destination Unreachable code mappings are correct?Select all correct answers.Code 3 — Echo ReplyCode 0 — Time ExceededCode 0 — Network UnreachableCode 3 — Port UnreachableCode 1 — Host UnreachableICMP, Ping & TracerouteEasy1 mark(s)6. Which ICMPv4 message types are correctly matched with their common purpose?Select all correct answers.Type 8 — Echo RequestType 8 — Time ExceededType 3 — Destination UnreachableType 0 — Echo ReplyType 0 — RedirectICMP, Ping & TracerouteHard1 mark(s)7. Which observations can suggest ICMP rate limiting rather than actual forwarding loss?Select all correct answers.An intermediate hop shows loss while later hops respond normallyAny single missing traceroute response always proves packet lossA router must respond to every ICMP diagnostic packet at full priorityRepeated tests show inconsistent replies from one transit hop but stable later hopsThe destination shows no corresponding end-to-end lossICMP, Ping & TracerouteMedium1 mark(s)8. Which statements correctly describe an asterisk (*) shown for a traceroute hop?Select all correct answers.It always proves that traffic cannot pass beyond that routerFiltering or rate limiting may suppress the responseThe router may be configured not to send or prioritize diagnostic repliesIt means the router has no IP addressThe expected response was not received within the timeoutICMP, Ping & TracerouteEasy1 mark(s)9. Which statements correctly compare ping and traceroute?Select all correct answers.Traceroute is useful for observing intermediate Layer 3 hopsPing is useful for basic reachability and round-trip measurementsTraceroute always proves application-layer healthPing always reveals every router in the pathBoth can be affected by filtering or control-plane rate limitingICMP, Ping & TracerouteMedium1 mark(s)10. Which statements about ICMP Destination Unreachable messages are correct?Select all correct answers.ICMPv4 uses Type 3 for Destination UnreachableDifferent codes can provide more specific reasonsThey can indicate that a packet could not be deliveredThey guarantee the original application was using TCPThey are Ethernet broadcast frames by definitionICMP, Ping & TracerouteHard1 mark(s)11. Which statements about Path MTU Discovery and ICMP are correct for IPv4?Select all correct answers.Blocking required ICMP messages can contribute to Path MTU problemsThe message can help a sender reduce packet sizeICMP can report that fragmentation is needed when a packet cannot be forwarded without fragmentation and DF is setPath MTU Discovery always depends on DNSICMP increases the physical Ethernet MTU automaticallyICMP, Ping & TracerouteMedium1 mark(s)12. Which tests can help distinguish DNS failure from basic IP reachability failure?Select all correct answers.Change the switch MAC table before checking name resolutionAssume a failed hostname test always proves the router is downPing the destination by IP addressPing or resolve the destination by hostnameUse nslookup or dig to test DNS resolutionICMP, Ping & TracerouteMedium1 mark(s)13. Why does traceroute commonly begin with a TTL or hop limit of 1?Select all correct answers.The first router is expected to expire the first probeTTL 1 opens TCP port 1 on every routerLater probes can use larger values to discover subsequent hopsTTL 1 means the destination must be one kilometer awayThe first hop can return a Time Exceeded responseICMP, Ping & TracerouteMedium1 mark(s)14. Which statements about a successful ping are correct?Select all correct answers.It indicates that the tested ICMP Echo exchange succeededIt provides some evidence of IP reachability between the endpointsIt does not prove that a specific TCP application port is openIt guarantees every application on the destination is healthyIt proves DNS is working even when the test used only an IP addressICMP, Ping & TracerouteHard1 mark(s)15. Which statements about ICMP Redirect messages are correct?Select all correct answers.They are required for every routed packetTheir acceptance is often restricted for security reasonsThey replace dynamic routing protocols between routersThey are control messages rather than application dataA router can use them to suggest a better next hop to a host under certain conditionsICMP, Ping & TracerouteMedium1 mark(s)16. When can ICMPv4 Port Unreachable commonly be observed?Select all correct answers.It means an Ethernet switch port is administratively downA UDP probe reaches a host where the target UDP port is closedIt is an ICMP Destination Unreachable conditionSome traditional UDP-based traceroute implementations can receive it at the destinationIt is the normal response to every successful TCP connectionICMP, Ping & TracerouteMedium1 mark(s)17. Which conditions can cause ping to fail even when a host or service is otherwise reachable?Select all correct answers.The destination can be configured not to respond to Echo RequestsA firewall can block ICMP Echo trafficEvery failed ping proves the destination host is powered offAn intermediate security policy can filter ICMPPing failure always means the Ethernet cable is disconnectedICMP, Ping & TracerouteMedium1 mark(s)18. Which statements correctly describe classic traceroute behavior?Select all correct answers.It requires every hop to respond for the destination to be reachableIntermediate routers can respond when a probe's TTL expiresIt downloads each router's complete configurationIt sends probes with progressively increasing hop limits or TTL valuesThe responses help reveal the path hop by hopICMP, Ping & TracerouteHard1 mark(s)19. A traceroute shows responses for hops 1 through 5, hop 6 shows *, and hops 7 through the destination respond normally. Which interpretations are reasonable?Select all correct answers.The destination is unreachable because one intermediate hop did not replyHop 6 must be physically disconnectedHop 6 is still likely forwarding transit traffic because later hops respondThe asterisk alone does not prove a forwarding outage at hop 6Hop 6 may be filtering or rate-limiting traceroute responsesICMP, Ping & TracerouteMedium1 mark(s)20. What can normally happen when an IPv4 packet's TTL expires at a router?Select all correct answers.The router changes the packet into a DHCP requestThe router discards the packetTraceroute can use the response to identify that hopThe router can send an ICMP Time Exceeded message toward the sourceThe router automatically increases the TTL and forwards the same packetICMP, Ping & TracerouteEasy1 mark(s)21. Which statements correctly describe the IPv4 TTL field?Select all correct answers.TTL is the DNS cache lifetime inside every IP packetTTL identifies the TCP destination portA router normally discards a packet when TTL expiresTTL is decremented as a packet is forwarded by routersTTL helps prevent packets from circulating indefinitelyICMP, Ping & TracerouteHard1 mark(s)22. Which conditions can produce misleading packet-loss conclusions from ping or traceroute?Select all correct answers.An intermediate router may deprioritize replies addressed to itself while forwarding transit traffic normallyDiagnostic traffic may receive different treatment from application trafficEvery ICMP response is guaranteed to receive the same priority as forwarded trafficOne missed probe always means exactly one percent application lossICMP responses may be rate-limitedICMP, Ping & TracerouteHard1 mark(s)23. Which checks form a useful ICMP, ping, and traceroute troubleshooting workflow?Select all correct answers.Assume every missing ICMP response proves a hardware failureVerify local IP addressing, subnet mask, and default gatewayUse traceroute to identify where path visibility or reachability changesCorrelate intermediate-hop loss with end-to-end destination loss before blaming a routerTest nearby and remote destinations progressivelyICMP, Ping & TracerouteMedium1 mark(s)24. Which statements about traceroute implementations are correct?Select all correct answers.The final response depends partly on the probe method and destination behaviorTraceroute is an Ethernet-only protocol with no IP involvementFirewalls can affect which hops or responses are visibleDifferent implementations can use ICMP, UDP, or TCP probesEvery traceroute implementation uses only ICMP Echo RequestICMP, Ping & TracerouteMedium1 mark(s)25. A destination responds to ping but an HTTPS website on that host does not open. Which conclusions are reasonable?Select all correct answers.The problem must be caused by ICMP TTL expirationBasic ICMP reachability existsTCP 443 or the web service still needs to be testedSuccessful ping proves HTTPS must be workingA firewall or application issue may affect HTTPS independently of pingPreviousNextSubmit Quiz Related Discover more from SanchitGurukul Subscribe to get the latest posts sent to your email. Type your email… Subscribe
