Our computer, the client, is connected to a local network that has two routers that both run network address translation (NAT). This means that we can reach the Internet in two ways.

A small repetition of the syntax: IP4 addresses are of the form XXXX where each X is a byte (8 bits). In the tables below, the destination is specified as e.g. XXXX/22 which means that the first 22 bits of the IP address XXXX are relevant for the network address. Router R1 has the following routing table:

while the client has the following routing table:

a) We assume that the web server has a packet filter which means that the web material is sent only to the network 22.22.1/24 while it is not sent to other networks. Using the given tables:

1.What IP address will the web server see the client as having?

2. Will the client receive the web material?

3. Assume that the web server wishes to send to the following three addresses. To which router does R1 forward the packets?

22.22.1.1 ?

22.22.3.1 ?

22.22.22.1 ?

#routeshow-inetInternet:Destination22.22.0/2233.33.33/24defaultGateway44.44.44.133.33.33.155.55.55.1Interfaceif2if3if1 #routeshow-inetInternet:Destination33.33.33/24192.168.0/24defaultGateway192.168.0.1192.168.0.5192.168.0.2Interfaceif1ifif1