Xuhua Ding

1
IS204 Course Review
2
Fundamentals

• Numeric Prefixes, Math Basics
• Characteristics of four types of information
• Response time and throughput
• Centralized vs. Distributed data process
• Classification of networks LAN, MAN, WAN
• Data flow simplex/half-duplex/full duplex
• Topology bus, star, ring, tree, mesh

3
Layer Model Web Application

• 5-Layer Model
• Three key elements of a protocol syntax,
  semantics, timing
• Difference between Service, Interface Protocol
• HTTP is stateless Cookie

4
Physical Layer

• Analog signal vs. Digital Signal
• Frequency, Spectrum, Bandwidth
• Transmission Impairments
• Guided attenuation, delay distortion, noise
• Wireless free-space loss, atmosphere absorption,
  multipath
• Bit, Baud rate
• Shannon theorem
• Error Correction using Parity bits

5
Data Link Layer

• Data link layer services
• framing, media access, flow control, reliable
  delivery
• ARQ
• Media access control
• TDMA, FDMA, CSMA/CD, Taking turns, (CDMA??)
• MAC broadcast, MAC address, ARP

6
Network Layer/Transport Layer

• The functionality of Network Layer and Transport
  Layer
• The services provided by IP, TCP, UDP
• Subnet
• DHCP
• Routing
• Addresses

7
Internet Model
5. Application Layer
User Data
Data
Data
4. Transport Layer
TCP
Data
3. Network Layer
2. Data Link Layer
1. Physical Layer
8
LAN
ROUTER
3. Network Layer
L3 SWITCH
logical topology
MAC Broadcast Domain
2. Data Link Layer
L2 SWITCH
broadcast storm
media selection
Collision Domain
1. Physical Layer
HUB
structured cabling
physical topology
9
LAN Networks
3. Network Layer
Virtual LAN

• membership
• architectures

CSMA/CD
CSMA/CA
2. Data Link Layer
Ethernet
Fast Ethernet
Gigabit Ethernet
10 Gigabit Ethernet
Wi-Fi
1. Physical Layer
hidden/exposed station problem
10
WAN
Switch WAN
Circuit Switching
VPN
Cellular Network
Dedicated Circuits
-concept -architecture -IPSec tunnel
Packet Switch

• basic operation
• media access

virtual circuit
datagram
Frame Relay -features
ATM -QoS -Cell
11
Internet

• Basic Internet Architecture
• NAP POP
• NAT