Flashcards
Topic No: 12 Communication Network Protocol
Cards in this deck (9)
- 1Role of IPProvides an addressing scheme.
Packet Switching: Routes packets of data from sources to destinations.
One message is composed of many packets taking different routes - 2Role of TCPProvides end-to-end reliability.
Ensures that all of the packets arrive safely.
Retransmissions are used to ensure safe arrival.
Applies sequence numbers to the packets at the source, and reorders the
packets at the destination. - 3Address SchemesMAC Address (Physical address)
12-digit hexadecimal (or 48 bit binary) number burnt into NIC.
Assigned by IEEE Standard Organization.
E.g. 00-20-AF-F8-E7-71 for a 3ComEthernet NIC
Physical Address (MAC Address) is burnt into the NIC.
Network Interface Layer. - 4Address SchemesIP Address (Logical address)
The 32-bit IP address is grouped eight bits at a time, separated by dots, and
represented in decimal format (known as dotted decimal notation).
Each bit in the octet has a binary weight (128, 64, 32, 16, 8, 4, 2, 1). The
minimum value for an octet is 0, and the maximum value for an octet is 255.
Eg : 176.15.123.11 - 5IP Address ClassesNetwork ID
– Assigned by Internet Network Information Center.
– Assigned by upper organization.
– Identifies the network to which a devices is attached.
Host ID.
– Assigned by a network administrator.
– Identifies the specific device on that network. - 6Class A IP Address Bit pattern First bit is always 0.
First 8 bits used to identify the network part of the address.
Possible range of class A network address:
1.0.0.0 to 127.0.0.0
The remaining three octets can be used for the host portion of the address.
Each class A network have up to 16,777,214 possible IP addresses.
For large size network - 7Class B IP Address Bit pattern First 2 bits is always 1 0.
First two octets used to identify network part of the address.
Possible range of class B network address :
128.0.0.0 to 191.255.0.0
The remaining two octets (16 bits)can be used for the host portion of the
address.
Class B network have up to 65,534 possible IP addresses. (216
-2)
For medium size network - 8Class C IP Address Bit pattern First 3 bits is always 1 1 0.
First three octets to identify the network part of the address.
Possible range of class C network address:
192.0.0.0 to 223.255.255.0.
The remaining last octet can be used for the host portion of the address.
Class C network have up to 254 possible IP addresses - 9Summary of Class RangesCLASS A - 0 TO 127
CLASS B - 128 TO 191
CLASS C - 192 - 223
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- marine electronics Flashcards on Topic No: 12 Communication Network Protocol, created by izz azman on 25/08/2020.
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