BitWithBite
CCNA Networking Worksheet
🌐 Data Link Layer
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NameClassDate
After this worksheet you can
Layer 2 purposeFrames and MAC addressingTopologiesMedia access control📚 Quick Recap
🎯 What you'll learn: The Data Link layer's purpose and sublayers (LLC and MAC), physical and logical topologies, WAN topologies, LAN topologies, half vs full duplex, and contention-based access methods (CSMA/CD and CSMA/CA).
🧠 Section A · Concept Check ● BEGINNER 4 × 1 = 4
1Layer 2 addressing uses:
2The data link layer packages packets into:
3The two L2 sublayers are LLC and:
4Frame check sequence (FCS) detects:
🧮 Section B · Problem Solving ● INTERMEDIATE 2 + 3×3 = 11
5A MAC address is bits long.
6Frames have a header, data and a .
7Why do we need MAC when we have IP?
8What does the FCS trailer do?
9Star vs mesh topology tradeoff?
🚀 Section C · Challenge ● CHALLENGE 5
10What changes in a frame across each router hop?
💭 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 48 6 trailer/FCS 7 = Local delivery on the segment is by MAC; IP routes between networks 8 = CRC check - receiver drops corrupted frames 9 = Star: cheap/simple; mesh: redundant but costly | 10 = Source/destination MACs are rewritten; IPs stay