Routing Methods in Telecommunications: Complex Project Task
Part 1. IPv4 Network Addressing Map
Table 1
0
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0
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1
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2
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255
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128
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0
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168
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255
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1
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2
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10
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Class B
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172
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16-
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-31
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Class A
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191
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192
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168
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Class C
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223
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224
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Class D
Multicast
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239
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240
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Class E
Reserved
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127
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255
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IP-Classes (mega networks):
A: 0…..…….……….. 27-2 networks x 224 addresses
B: 10.........................… 26+8 networks x 216 addresses
C: 110..……………… 25+16 networks x 28 addresses
D: 1110……………… 228 addresses
E: 1111....…………… 228-1 addresses
Internal (non public) networks:
A: 10.0.0.0/8
B: 172.16-31.0.0/16
C: 192.168.0-255.0/24
Loop Back network: 127.0.0.0/8
CIDR (Classless Inter-Domain Routing) since 1993 valid
Class-aware IPv4 Address Mapping
0 10 126 127 128 172 191 192 223 224 239 240 255
A
B
C
D
Multicast
E
Reserved
Part 2. IPv4 Class-aware routing
Table 2 -Test Questions
Nr.
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Class-aware Addressing Case
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Solution
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Mark
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1
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How many different networks of class “A” exist ?
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2
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How many different networks of class “B” exist ?
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3
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How many different networks of class “C” exist ?
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4
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How many IPv4 addresses in a class “A” network exist ?
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5
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How many IPv4 addresses in a class “B” network exist ?
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6
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How many IPv4 addresses in a class “C” network exist ?
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7
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How many different public networks of class “A” exist ?
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8
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How many different public networks of class “B” exist ?
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9
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How many different public networks of class “C” exist ?
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10
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How many different private networks of class “A” exist ?
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11
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How many different private networks of class “B” exist ?
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12
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How many different private networks of class “C” exist ?
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13
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How many interfaces may have the network
172.16.0.0/16 ?
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14
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To what network belongs the address 192.168.25.30 ?
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15
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What is the broadcast address for the host 172.30.1.1 ?
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16
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Create a multicast address
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17
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To what class belongs the address 255.255.255.1 ?
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18
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What means the address 127.1.1.1 ?
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19
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What is the loopback network address ?
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20
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How many different loopback addresses exist ?
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21
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What network includes two interfaces:
170.20.30.40 and 170.20.40.50 ?
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22
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What network includes the following interfaces:
200.30.40.50 and 200.30.40.60 ?
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23
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How many interfaces may have the network
192.168.1.0 ?
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24
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How many interfaces may have the network, that includes the network interface 172.21.1.1 ?
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25
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How many interfaces may have the network that includes the network interface 10.192.168.25 ?
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26
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27
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28
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29
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30
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Part 3. IPv4–Classless Interdomain Routing (CIDR – IETF 1993)
3.1 Host IPv4 routing table
Get access to your PC routing table. Be sure you do understand all the records in the table.
Be ready to comment the routing table records
Table 3
Table 4
Start – Run – cmd – OK route print
Route interfaces
0×1 ……………………………………. MS TCP Loopback interface
0×2 … 20 cf 30 b3 af a2 ……………… Realtec PCIe FE Family Controller
Active routes:
Network address Network mask Gateway address Interface Metrics
0.0.0.0 0.0.0.0 192.168.13.1 192.168.13.11 20
127.0.0.0 255.0.0.0 127.0.0.1 127.0.0.1 1
192.168.13.0 255.255.255.240 192.168.13.11 192.168.13.11 20
192.168.13.11 255.255.255.255 127.0.0.1 127.0.0.1 20
192.168.13.255 255.255.255.255 192.168.13.11 192.168.13.11 20
224.0.0.0 240.0.0.0 192.168.13.11 192.168.13.11 20
255.255.255.255 255.255.255.255 192.168.13.11 192.168.13.11 1
Default gateway 192.168.13.1
Permanent routes:
Absent
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