BitWithBite
CCNA Networking Worksheet
🌐 ICMP
SCORE___ / 20
NameClassDate
After this worksheet you can
ICMP purposeping and tracerouteCommon ICMP messagesICMPv6 roles📚 Quick Recap
🎯 What you'll learn: How ICMP provides diagnostic and error-reporting services at Layer 3, ICMPv4 message types and codes, ICMPv6 and Neighbor Discovery Protocol (NDP), using ping and traceroute to test connectivity, and a practical troubleshooting methodology using ICMP tools.
🧠 Section A · Concept Check ● BEGINNER 4 × 1 = 4
1ping uses ICMP:
2traceroute maps the path using:
3Destination unreachable is an:
4ICMPv6 additionally handles:
🧮 Section B · Problem Solving ● INTERMEDIATE 2 + 3×3 = 11
5ping tests between two hosts.
6Each traceroute hop replies with time-.
7ping works to IP but not to name - what's broken?
8How does traceroute discover hop 3?
9No ping reply - list 3 causes.
🚀 Section C · Challenge ● CHALLENGE 5
10Which two ICMPv6 messages configure hosts?
💭 Reflection — the most useful thing I learned:
A ___/4 B ___/11 C ___/5 Total ___/20
Teacher's Signature
Parent's Signature
✂ answer key — fold or cut before handing out
1-A 2-A 3-A 4-A | 5 reachability/connectivity 6 exceeded 7 = DNS resolution, not connectivity 8 = Sends packet with TTL=3; third router drops it and replies time-exceeded 9 = Host down, firewall blocking ICMP, routing/gateway issue | 10 = Router Solicitation and Router Advertisement