Wireless IP Using Foreign Agent Information - Assignment Example

When the network connection is not in the infrastructure mode, then it is in the ad-hoc wireless networks. This mode of operation allows nodes on the wireless network to communicate directly with each other. The infrastructure mode is better compared to the alternative ad-hoc wireless networks because it offers scalability, and security management at a central point and improves the reach. While AP devices seem as the only shortcoming of this infrastructure mode of operation. 

Question 2

The node does not need to be mobile because the internet through the access point has only one IP address. The node becomes mobile if the IP address and the name change and this happens in new locations. If the laptop user accesses the internet through the same AP then he/she is still within the same location. Dynamic Host Configuration (DHCP) could be used to solve the mobility of a node where the new IP address is acquired in a new location.

Question 3

1. X(t) will continue to come to fill the client buffer, the received TCP buffer will be drained at a rate of d by the client application after the client buffer has been filled by the incoming buffer from the server buffer. The client will therefore store the received data without playing it back immediately as it receives it this provides a playout delay. The data is played from the buffer allowing the received data to fill the backup of the buffer. The playout delay is increased by accumulating more data in the buffer before playing it. Unusual delay of the playout results in data in the buffer dipping more than usual than the prefilled data. Therefore the client buffer evolves with the buffering and playout delays in addition to delays by the network.   When considering switching from TCP to UDP sound quality should be a factor because TCP gives better sound quality than UDP.

Question 4

1. When a high-priority packet arrives during the transmission of a low-priority packet, preemptive scheduling occurs. There is an interruption of lower priority packet while higher priority packet is transmitted in full. Preemptive scheduling does not make sense in networks since it wastes a lot of bandwidth given that the lower packet is partially received which does not make sense. In the figure assume that packets 1, 3, and 4 are of higher priority while 2 and 5 are of lower priority the transmission of packets will be interrupted if the higher priority packets arrive before the completion of lower priority packets.

In a preemptive priority queuing the packets of higher priority will be sent first before the transmission of lower priority packets hence packets 1,3,4,2 then 5 sequences will be followed.

1. Delay play-out is used to compensate for delays in the network and the delay of the jitter in the transmission of the packets.