1. Assume a 1,000,000 byte file must be distributed by a server to 5 clients. The server upload capacity is 100,000 bytes/second. The clients have download capacities 50,000 bytes/sec, 40,000 bytes/sec, 60,000 bytes/sec, 100,000 bytes/sec and 19,000 bytes/sec. What is the minimum time required for all the clients to have received a copy of the file?
2. Use dig to simulate an iterative DNS query to resolve cs.columbia.edu. Steps:
(a) Find the address of a root server in /etc/bind/db.root
(b) Query a root server for cs.columbia.edu
(c) Query a top-level-domain server for cs.columbia.edu
(d) Query an authoritative server for cs.columbia.edu
Deliverable: Screen captures of all the steps. The captures must be labeled with the actual step being performed (root query, tld query, authoritative query)