BitWithBite
CCNA Networking Worksheet
🌐 Ethernet Switching
SCORE___ / 20
NameClassDate
After this worksheet you can
Ethernet frame fieldsMAC address table learningSwitch forwarding decisionsDuplex/speed📚 Quick Recap
🎯 What you'll learn: Ethernet frame structure and fields, MAC address format and types (unicast/broadcast/multicast), how switches learn and forward frames, the MAC address table (CAM table), and switch forwarding methods (store-and-forward vs cut-through).
🧠 Section A · Concept Check ● BEGINNER 4 × 1 = 4
1Switches build their MAC table from:
2An unknown destination MAC causes:
3Full duplex means:
4Store-and-forward switching checks:
🧮 Section B · Problem Solving ● INTERMEDIATE 2 + 3×3 = 11
5A switch forwards a known unicast out port.
6MAC table entries age if unused.
7Frame arrives: source AAA, dest BBB (unknown). What happens?
8Why did full duplex kill collisions?
9Store-and-forward vs cut-through?
🚀 Section C · Challenge ● CHALLENGE 5
10What breaks with a duplex mismatch?
💭 Reflection — the most useful thing I learned:
A ___/4 B ___/11 C ___/5 Total ___/20
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✂ answer key — fold or cut before handing out
1-A 2-A 3-A 4-A | 5 one/the specific 6 out/expire 7 = Learn AAA on that port; flood the frame to all other ports 8 = Separate send/receive paths - no shared medium contention 9 = Full-frame + error check vs faster but may forward bad frames | 10 = Late collisions/CRC errors, terrible performance