Match the Internet applications to the application-layer protocols that they use.

Is a Web server an end system?

Consider the figure below, in which a single router is transmitting packets, each of length L bits, over a single link with transmission rate R Mbps to another router at the other end of the link.

Suppose that the packet length is L= 16000 bits, and that the link transmission rate along the link to router on the right is R = 10 Mbps

What is the

maximum number of packets per second that can be transmitted by the link?

An institution has a 1.54 Mbps

access link to the public Internet and a 1 Gbps LAN. A local web cache is

implemented with a cache hit rate of 0.5, meaning 50% of requests are served

locally with negligible delay. The remaining 50% of requests must be retrieved

from origin servers over the Internet. The average data rate to browsers per

second is 1.80 Mbps.

What is the new access link

utilisation after introducing caching? Please give your answer as a percentage.

Identify

whether the following statement is True or False.

Persistent

HTTP is more efficient for loading webpages with multiple resources.

A

 large e-commerce website is optimizing its page loading times, which currently

suffer from slow performance when loading product pages that contain many

images, JavaScript files, and advertisements. The website is using

non-persistent HTTP, where every image, script, and ad causes a new TCP

connection to be opened and closed. This increases the round-trip time (RTT)

and causes significant delays. The development team is now considering

switching to 

W

hich

of the following statements correctly describe the issues with non-persistent

HTTP and the benefits of persistent HTTP in this scenario? (

Identify if the following statement is True or False.

The main function of an access network is to connect end devices to the core network, allowing them to access the internet.

Asymmetric encryption is typically used to encrypt bulk data, while

symmetric encryption is used to encrypt the key for secure key exchange.

State

whether the following statement regarding connectionless demultiplexing is true

or false:

"IP/UDP

datagrams with the same destination port number, but different source IP

addresses and/or source port numbers, will be directed to different