Q3: Select the proper selection or selections: (20 marks) 1- How long does it take a packet of length 100 bytes to propagate over a link of distance 2500 km when the propagation speed is 25-10m/s and transmission rate 2 Mbps? a. 1 msec b. 10 msec C, 1000 msec d. 10 sec e. None of the above 2-..... provides delay measurement from source to router along end-to-end Internet path towards destination. a ping b. traceroute C. nslookup d. ipconfig all e. tracert 3- Congestion control is one of the top-10 problems in computer. ... are examples of its manifestations. a. Buffer overflow at routers b. Buffer overflow at the receiver C. Queueing in the receiver buffer d. Queueing in routers buffer e. All of the above 4- ****, is an example of path vector protocol. a, OSPF b. RIP C. BGP d. Hot potato e. None of the above 5- The concept of OpenFlow is based on ..... a. Separation of routing table and forwarding table b. Separation of static routing and dynamic routing Separation of Control plane and data plane d. Separation of management and policy configurations e. All of the above 6- The architecture of routers consist of .. a. Routing processing b. Router input port C. Router output port d. High speed switching fabric e. All of the above 7- ....... record is used to map the mail server's host name to its IP address. Consequently, an 2-3 organization's mail server and Web server can have the same alias for a host name, a. Type A b. Type NS c Type CNAME d. Type MX e. None of the above 8- Suppose an application generates chunks of 60 bytes of data every 20 msec, and each chunk gets encapsulated in a TCP segment and then an IP datagram. What percentage of each datagram will be overhead? a 10% overhead b. 20% overhead C. 30% overhead d. 40% overhead e. 50% overhead 9- Elastic applications can make use of as much, or as little throughput as happens to be available. ... is/are example/s for elastic application. a. e-mail b. real-time video/audio C. stored video/audio d. text messaging e. all of the above 10- Host A sends two TCP segments back to back to Host B over a TCP connection. The first segment has sequence number 90: the second has sequence number 110. How much data is in the first segment? a. 19 bytes b. 20 bytes C. 21 bytes d unknown e. the size of data is based on data transmission rate