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Sem1 - Module 10 Routing Fundamentals and Subnets

Sem1 - Module 10 Routing Fundamentals and Subnets. Network address provide a convenient way to refer to all of the addresses on a particular network or subnetwork. Two hosts with differing network address require a device, typically a router, in order to communicate.

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Sem1 - Module 10 Routing Fundamentals and Subnets

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  1. Sem1 - Module 10Routing Fundamentals and Subnets

  2. Network address provide a convenient way to refer to all of the addresses on a particular network or subnetwork. Two hosts with differing network address require a device, typically a router, in order to communicate. An IP address that ends with binary 0s in all host bits is reserved for the network address. Network address

  3. Broadcast goes to every host with a particular network ID number. An IP address that ends with binary 1s in all host bits is reserved for the directed broadcast address. An IP address with binary 1s in all network bits and host bits is reserved for the local broadcast address. Broadcast address

  4. STOP Local broadcast address 255.255.255.255

  5. 192.168.20.0 Directed broadcast address 192.168.20.255 Broadcast address

  6. 172.16.20.200 is Class: B address Network portion: 172.16 Host portion: 20.200 Network address: 172.16.0.0 Broadcast address: 172.16.255.255 Example: 172.16.20.200

  7. What is the decimal and binary range of the first octet of class B IP addresses? Decimal: 128 – 191 Binary:   10000000 – 10111111 Which octet(s) represent the network portion of a class C IP address? The first three octets Which octet(s) represent the host portion of a class A IP address? The last three octets

  8. IP Addresses C 216.14.55 137 216.14.55.255 A 123 1.1.15 123.255.255.255 B 150.127 221.244 150.127.255.255 C 194.125.35 199 194.125.35.255 B 175.12 239.244 175.12.255.255

  9. 150.100.255.255 This is a Class B This is the Broadcast Address: NO - not valid IP Address Valid IP Address?

  10. 175.100.255.185 This is a Class B The Host Bits are not all 0s or 1s: Yes - valid IP Address Valid IP Address?

  11. 195.234.253.0 This is a Class C This is the Network Address: NO - not valid IP Address Valid IP Address?

  12. 100.0.0.23 This is a Class A The Host Bits are not all 0s or 1s: Yes - valid IP Address Valid IP Address?

  13. 188.256.221.176 This would be a Class B BUT the 2nd Octet is greater than 255 NO - not valid IP Address Valid IP Address?

  14. 127.34.25.189 This would be a Class A BUT is invalid since 127 cannot be used in the first Octet – reserved for diagnostic testing NO - not valid IP Address Valid IP Address?

  15. 224.156.217.73 This is a Class D network Class D is reserved for multicasting & cannot be used as a commercial IP address NO - not valid IP Address Valid IP Address?

  16. SubNet Mask Notation: • Class C: 255.255.255.0 • 192.168.100.0 255.255.255.0 • 192.168.100.0/24 (24 Bits in the Network part) • Class B: 255.255.0.0 • 172.16.0.0 255.255.0.0 • 172.16.0.0/16 (16 Bits in the Network part) • Class A: 255.0.0.0 • 10.0.0.0 255.0.0.0 • 10.0.0.0/8 (8 Bits in the Network part)

  17. SubNet Mask Notation: Not Valid for Class C (MUST borrow at least 2 Bits) The last two bits in the last octet, regardless of the IP address class, may never be assigned to the subnetwork. These bits are referred to as the last two significant bits.

  18. Host Subnet Schemes The number of lost IP addresses with a Class C network depends on the number of bits borrowed for subnetting.

  19. SubNet Mask Notation: • Consider Network: 192.168.23.0/24 • Subnet with a SNM: • 255.255.255.224 • 3 Bits Borrowed  /27 Fourth Octet 1 1 1 0 0 0 0 0 SubNet Bits Host Bits

  20. SubNet Mask Notation: Network: 192.168.23.0/27  SNM 255.255.255.224 192.168.23.0 192.168.23.1 192.168.23.30 192.168.23.31 192.168.23.32 192.168.23.33 192.168.23.62 192.168.23.63 192.168.23.64 192.168.23.65 192.168.23.94 192.168.23.95 192.168.23.96 192.168.23.97 192.168.23.126 192.168.23.127 192.168.23.128 192.168.23.129 192.168.23.158 192.168.23.159 192.168.23.160 192.168.23.161 192.168.23.190 192.168.23.191 192.168.23.192 192.168.23.193 192.168.23.222 192.168.23.223 192.168.23.224 192.168.23.225 192.168.23.254 192.168.23.255

  21. Classes of IP address and range of IP on each class. Determine network portion and host portion in a IP address. Understand about broadcast addresses. Understand about valid host address. Binary and Decimal conversion. Subnetting Review

  22. Labs: 10.3.5a (Basic Subnetting) 10.3.5b (Subnetting a Class A Network) 10.3.5c (Subnetting a Class B Network) 10.3.5d (Subnetting a Class C Network) 10.2.9 (Small Router Purchase) – Homework See Web Page for Extra Practice Chapter #10

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