Application Layer & Protocols

0 / 12 solved

Question Tags Difficulty Success

1. HTTP Status Code 304

Networking

Medium 22%

2. DNS Resolution

dnsresolution +3

Medium 83%

3. Unicast vs Broadcast vs Multicast

unicastbroadcast +4

Medium 80%

4. TLS Handshake

tlshandshake +4

Medium 87%

5. Retry Without Asking

http-methodsidempotency +2

Medium —

6. Verbs Promise Nothing

httpidempotency +2

Medium 42%

7. Broadcast The Rejection

dhcpbroadcast +2

Medium 90%

8. Nineteen Objects Six Sockets

http1-1http2 +2

Medium —

9. CNAME At The Apex

dnscname +2

Hard 48%

10. One Segment Lost

http2head-of-line-blocking +2

Hard 70%

11. Eight One Eight Zero

dnspacket-decoding +2

Hard —

12. Two Body Endings

http-framingchunked-encoding +2

Hard —

Networkingdnsresolutionhierarchyapplication_layernetworkingunicastbroadcastmulticastigmpip_addressingtlshandshakecertificatesencryptionhttp-methodsidempotencyretriesrfc-9110httpput-vs-postretry-safetydhcpserver-identifierlease-allocationhttp1-1http2tls-handshakelatency-mathcnamezone-apexmx-recordshead-of-line-blockingmultiplexingtcppacket-decodingdns-headerrfc-1035http-framingchunked-encodingrequest-smugglingrfc-9112+1+2+3+4+5+6

Learning Resources

TCP/IP Illustrated, Volume 1: The Protocols, Chapters 1 - 1.4, 11 - 11.5