datagram subnet is connection oriented network.
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What are the pros and cons of intermediate reassembly of an internet fragmented datagram versus reassembly at the final destination
datagram is used in conectionless n/w e.g. UDP Whereas packets used in connection oriented n/w e.g. ATM X.25 tcp
A default subnet mask gives you classful addressing on octet boundaries. A non-default subnet mask implies that you are subnetting a larger network into several smaller ones.
255.0.0.0The default subnet mask of a class A network is 255.0.0.0
Comparison of Datagram and Virtual Circuit SubnetIssue Datagram Virtual CircuitConnection SetupNoneRequiredAddressingPacket contains full source and destination addressPacket contains short virtual circuit number identifier.State informationNone other than router table containing destination networkEach virtual circuit number entered to table on setup, used for routing.RoutingPackets routed independentlyRoute established at setup, all packets follow same route.Effect of router failureOnly on packets lost during crashAll virtual circuits passing through failed router terminated.Congestion controlDifficult since all packets routed independently router resource requirements can vary.Simple by pre-allocating enough
A protocol is a set of rules for describing how to successfully exchange information between two systems.
IP Datagram
Total number of bytes in the datagram, including the header.The length of an IP datagram itself is technically measured in bytes. The length field represents the size of both the header and the data portions of the datagram.
The datagram length field in an IP header is 16 bits in length. Therefore, the maximum datagram size an IP datagram can support is 2^16 - 1 = 65,535 bytes
It uses something called a checksum to verify datagram integrity
When a client wishes to send a UDP datagram there is nothing that they are required to except to send it. The datagram will use a checksum to verify the integrity of the datagram and deliver it where it needs to go.
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A Subnet calculator is used for determining the attributes of an IP subnet including the start of it. Results of the subnet calculation include the access control lists, the subnet range and the subnet bitmap.
No. 192.168.12.1 - 192.168.12.254 is one subnet (assuming 255.255.255.0 subnet mask)
Answer B DiffServ Page 831
If you divide a net into several subnets, subnet-zero is the first subnet. Some older technologies don't allow the use of this first subnet.If you divide a net into several subnets, subnet-zero is the first subnet. Some older technologies don't allow the use of this first subnet.If you divide a net into several subnets, subnet-zero is the first subnet. Some older technologies don't allow the use of this first subnet.If you divide a net into several subnets, subnet-zero is the first subnet. Some older technologies don't allow the use of this first subnet.