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Hands-On Ethical Hacking and Network Defense Chapter 2 TCP/IP Concepts Review
Objectives ,[object Object],[object Object],[object Object]
Overview of TCP/IP ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
The Application Layer ,[object Object],[object Object],[object Object]
The Transport Layer ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
TCP Header Format ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
TCP Segment Headers ,[object Object],[object Object],[object Object],[object Object],[object Object]
TCP Flags ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Initial Sequence Number (ISN) ,[object Object],[object Object],[object Object],[object Object],[object Object]
TCP Ports ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Blocking Ports ,[object Object],[object Object],[object Object],[object Object],[object Object]
TCP Ports (continued) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
TCP Ports (continued) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
TCP Ports (continued) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
TCP Ports (continued) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
TCP Ports (continued) ,[object Object],[object Object],[object Object],[object Object]
Demonstration ,[object Object],[object Object],[object Object],[object Object]
Demonstration ,[object Object],[object Object],[object Object],[object Object]
User Datagram Protocol (UDP) ,[object Object],[object Object],[object Object],[object Object],[object Object]
The Internet Layer ,[object Object],[object Object],[object Object]
Internet Control Message Protocol (ICMP) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
ICMP Type Codes
Wireshark Capture of a PING
Warriors of the Net ,[object Object],[object Object]
IP Addressing ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
IP Addressing (continued) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
IP Addressing (continued) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
IP Addressing (continued) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
IP Addressing (continued) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Planning IP Address Assignments ,[object Object],[object Object],[object Object],[object Object]
Planning IP Address Assignments ,[object Object],[object Object],[object Object],[object Object]
In-Class Exercises These aren’t in the handout, but you can practice them by doing project X1 for extra credit.
Good Network IP Address Subnet Mask Default Gateway Hub To the Internet 192.168.1.101 255.255.255.0 192.168.1.1 192.168.1.102 255.255.255.0 192.168.1.1 192.168.1.103 255.255.255.0 192.168.1.1 192.168.1.1 255.255.255.0 147.144.51.1
Duplicate IP Address IP Address Subnet Mask Default Gateway Hub To the Internet 192.168.1.101 255.255.255.0 192.168.1.1 192.168.1.101 255.255.255.0 192.168.1.1 192.168.1.103 255.255.255.0 192.168.1.1 192.168.1.1 255.255.255.0 147.144.51.1
IP Address Outside Subnet IP Address Subnet Mask Default Gateway Hub To the Internet 192.168.1.101 255.255.255.0 192.168.1.1 192.168.2.102 255.255.255.0 192.168.1.1 192.168.1.103 255.255.255.0 192.168.1.1 192.168.1.1 255.255.255.0 147.144.51.1
Wrong Subnet Mask IP Address Subnet Mask Default Gateway Hub To the Internet 192.168.1.101 255.255.255.0 192.168.1.1 192.168.1.102 255.255.0.0 192.168.1.1 192.168.1.103 255.255.255.0 192.168.1.1 192.168.1.1 255.255.255.0 147.144.51.1
Wrong Default Gateway IP Address Subnet Mask Default Gateway Hub To the Internet 192.168.1.101 255.255.255.0 192.168.1.1 192.168.1.102 255.255.255.0 192.168.1.101 192.168.1.103 255.255.255.0 192.168.1.1 192.168.1.1 255.255.255.0 147.144.51.1
Find the Problem #1 IP Address Subnet Mask Default Gateway Hub To the Internet 192.168.2.101 255.255.255.0 192.168.2.1 192.168.2.102 255.255.255.0 192.168.2.1 192.169.2.103 255.255.255.0 192.168.2.1 192.168.2.1 255.255.255.0 147.144.51.1
Find the Problem #2 192.168.1.101 255.255.255.255 192.168.1.1 IP Address Subnet Mask Default Gateway Hub To the Internet 192.168.1.102 255.255.255.0 192.168.1.1 192.168.1.103 255.255.255.0 192.168.1.1 192.168.1.1 255.255.255.0 147.144.51.1
Find the Problem #3 IP Address Subnet Mask Default Gateway Hub To the Internet 192.168.2.101 255.255.255.0 192.168.2.1 192.168.2.102 255.255.255.0 192.168.2.1 192.168.2.102 255.255.255.0 192.168.2.1 192.168.2.1 255.255.255.0 147.144.51.1
Find the Problem #4 IP Address Subnet Mask Default Gateway Hub To the Internet 192.168.0.101 255.255.255.0 192.168.2.1 192.168.0.102 255.255.255.0 192.168.0.1 192.168.0.103 255.255.255.0 192.168.0.1 192.168.0.1 255.255.255.0 147.144.51.1
Find the Problem #5 IP Address Subnet Mask Default Gateway Hub To the Internet 192.168.1.101 255.255.255.0 192.168.1.1 192.168.1.102 255.255.255.0 192.168.1.1 192.168.1.103 255.255.255.0 192.168.1.1 192.168.1.4 255.255.255.0 147.144.51.1
Answers ,[object Object],[object Object],[object Object],[object Object],[object Object]
Overview of Numbering Systems ,[object Object],[object Object],[object Object]
Reviewing the Binary Numbering System ,[object Object],[object Object],[object Object],[object Object],[object Object]
UNIX and Linux Permissions ,[object Object],[object Object],[object Object],[object Object]
Examples of Determining Binary Values ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Understanding Nibbles ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Understanding Nibbles (continued) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Reviewing the Octal Numbering System ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Reviewing the Hexadecimal Numbering System ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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TCP/IP basics

  • 1. Hands-On Ethical Hacking and Network Defense Chapter 2 TCP/IP Concepts Review
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  • 36. In-Class Exercises These aren’t in the handout, but you can practice them by doing project X1 for extra credit.
  • 37. Good Network IP Address Subnet Mask Default Gateway Hub To the Internet 192.168.1.101 255.255.255.0 192.168.1.1 192.168.1.102 255.255.255.0 192.168.1.1 192.168.1.103 255.255.255.0 192.168.1.1 192.168.1.1 255.255.255.0 147.144.51.1
  • 38. Duplicate IP Address IP Address Subnet Mask Default Gateway Hub To the Internet 192.168.1.101 255.255.255.0 192.168.1.1 192.168.1.101 255.255.255.0 192.168.1.1 192.168.1.103 255.255.255.0 192.168.1.1 192.168.1.1 255.255.255.0 147.144.51.1
  • 39. IP Address Outside Subnet IP Address Subnet Mask Default Gateway Hub To the Internet 192.168.1.101 255.255.255.0 192.168.1.1 192.168.2.102 255.255.255.0 192.168.1.1 192.168.1.103 255.255.255.0 192.168.1.1 192.168.1.1 255.255.255.0 147.144.51.1
  • 40. Wrong Subnet Mask IP Address Subnet Mask Default Gateway Hub To the Internet 192.168.1.101 255.255.255.0 192.168.1.1 192.168.1.102 255.255.0.0 192.168.1.1 192.168.1.103 255.255.255.0 192.168.1.1 192.168.1.1 255.255.255.0 147.144.51.1
  • 41. Wrong Default Gateway IP Address Subnet Mask Default Gateway Hub To the Internet 192.168.1.101 255.255.255.0 192.168.1.1 192.168.1.102 255.255.255.0 192.168.1.101 192.168.1.103 255.255.255.0 192.168.1.1 192.168.1.1 255.255.255.0 147.144.51.1
  • 42. Find the Problem #1 IP Address Subnet Mask Default Gateway Hub To the Internet 192.168.2.101 255.255.255.0 192.168.2.1 192.168.2.102 255.255.255.0 192.168.2.1 192.169.2.103 255.255.255.0 192.168.2.1 192.168.2.1 255.255.255.0 147.144.51.1
  • 43. Find the Problem #2 192.168.1.101 255.255.255.255 192.168.1.1 IP Address Subnet Mask Default Gateway Hub To the Internet 192.168.1.102 255.255.255.0 192.168.1.1 192.168.1.103 255.255.255.0 192.168.1.1 192.168.1.1 255.255.255.0 147.144.51.1
  • 44. Find the Problem #3 IP Address Subnet Mask Default Gateway Hub To the Internet 192.168.2.101 255.255.255.0 192.168.2.1 192.168.2.102 255.255.255.0 192.168.2.1 192.168.2.102 255.255.255.0 192.168.2.1 192.168.2.1 255.255.255.0 147.144.51.1
  • 45. Find the Problem #4 IP Address Subnet Mask Default Gateway Hub To the Internet 192.168.0.101 255.255.255.0 192.168.2.1 192.168.0.102 255.255.255.0 192.168.0.1 192.168.0.103 255.255.255.0 192.168.0.1 192.168.0.1 255.255.255.0 147.144.51.1
  • 46. Find the Problem #5 IP Address Subnet Mask Default Gateway Hub To the Internet 192.168.1.101 255.255.255.0 192.168.1.1 192.168.1.102 255.255.255.0 192.168.1.1 192.168.1.103 255.255.255.0 192.168.1.1 192.168.1.4 255.255.255.0 147.144.51.1
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