Cisco^® CCENT Exam Cram Notes : TCP And UDP Frames

1. Networking Fundamentals

1. OSI and DoD Models

1.4. TCP and UDP Frames :

The frames for both TCP and UDP are as given below:

TCP Frame:

TCP frame fields: Total 20 bytes long.

1. Sequence Number

2. AcK number

3. Data offset

4. Reserved

5. Control bit

6. Window

7. Urgent Pointer

8. Options

9. Padding

10. Check Sum

11. Source port

12. Destination port

CCENT Cram Notes Contents

• 1. OSI and DoD Models
  • 1.1. OSI Models and its function
  • 1.2. DOD Models and its function
  • 1.3. TCP and UDP
  • 1.4. TCP and UDP Frames
• 2. Network topologies and Flow control
  • 2.1 Different Types of N/w Topologies
  • 2.2 CSMA/CD
• 3. Wireless LANs (SSIDs, WLC, etc.)
• 4. IPv4 Addressing
  • 4.1. Subnetting (IP4)
  • 4.2 VLSM
  • 4.3 Examples on subnetting
• 5. IPv6 addressing
• 6. Wide Area Networks (WANs)
  • 6.1. DTE and DCE
  • 6.2 Different cable types
  • 6.3 Interface specifications
• II. Cisco IOS
  • 1. Cisco Router Architecture
    • 1.1 Block Diagram
    • 1.2 Architectural Components of a Router
    • 1.3 Memory Details of a Typical Cisco Router
  • 2. Cisco Router (25xx series) and its interfaces
    • 2.1 Interfaces Explained
    • 2.2 Console Port Configuration
  • 3. Router modes of operation
  • 4. Frequently used copy commands
  • 5. Different types of router passwords
• III. Routing Fundamentals
  • 1. Routed and Routing Protocol
  • 2. Routing protocol types
  • 3. CDP and LLDP
  • 4. Static and Default route
  • 5. Floating static route
  • 6. IP routing and PPP
  • 7. RIP and RIPv2
• IV. Switching Fundamentals
  • 1. Introduction to Cisco Switches
  • 2. VLANs and VTP
  • 3. VLAN Frame tagging
  • 4. Switching methods
  • 5. Switch configuration commands
  • 6. File systems available in Catalyst switches and their usage
  • 7. Switch ports and port security
• V. Infrastructure Services & Maintenance
  • 1. DNS
  • 2. DHCP
  • 3. NAT
  • 4. Access-lists
  • 5. Diagnostic commands
  • 6. Show commands and other related commands
• VI. Appendix
  • 1. IEEE standards