Vol 1 Ch 1 - Introduction to TCP/IP Networking

Question 1

TCP/IP application layer protocols

Answer 1

HTTP
POP3
SMTP

Question 2

TCP/IP transport layer protocols

Answer 2

TCP

UDP

Question 3

TCP/IP Internet layer protocols

Answer 3

IP

ICMP

Question 4

TCP/IP Data Link and Physical layer protocols

Answer 4

Ethernet

802.11 (Wi-Fi)

Question 5

Adjacent-layer interactions

Answer 5

A higher layer requests that the next lower layer perform a needed function.

Question 6

Steps for data encapsulation

Answer 6

1. APPLICATION layer encapsulation. The application layer may or not add a header.
2. TRANSPORT layer encapsulation
3. NETWORK - IP layer encapsulation
4. DATA layer encapsulation
5. TRANSMIT the bits via the physical layer

LINK HEADER | IP | TCP | DATA | LINK TRAILER

Question 7

Comparing OSI and TCP/IP Layer Names and Numbers

Answer 7

OSI TCP/IP

7. Application 5-7 Application
8. Presentation
9. Session
10. Transport 4 Transport
11. Network 3 Network
12. Data Link 2 Data Link
13. Physical 1 Physical

Question 8

PDU

Answer 8

Protocol Data Unit (PDU
OSI terminology

L7PDU
L6PDU
L5PDU
L4PDU
L3PDU
L2PDU