Please help with this computer network homework.

CSIT 340-Computer Networks, HW 2 1. Describe the behaviors of and the differences between persistent and non-persistent HTTP. 2. List three application layer data transfer protocols used in email applications. Which onels) are used in sending emails? Which one(s) are used in retrieving emails? 3. A DNS resource record is specified as a 4-tuple: Describe how should we interpret a DNS resource record given the four resource record types: A, NS, CNAME, and MX. For this question, you can ignore the TTL field. A: NS: CNAME: MX: 4. Assume that a root domain name server only has the following records: e a2.nd.com, NS> a2 ad.cem 191.5.6.31,A> c 3.g2-server net, NS> 382-server.net, A>. Notice that only the first three fields of each resource record is shown If a local domain name server wants to know the IP address of google.com and sends a query to this root domain name server, what is the domain name for the domain name server that the local domain name server will contact next? What's the IP address of this domain name server? If a local domain name server wants to know the IP address of montclair.edu and sends a query to this root domain name server, what is the domain name for the domain name server that the local domain name server will contact next? What's the IP address of this domain name server