CSCI 434 please try do all question

Question 20 (1 point) Suppose a client downloads "index.html" from a server using persistent HTTP with pipelining (without parallel connections). If the "index.html" file contains three image files in addition to text, how many RTTs are needed to download the entire content in the html file? 1) three 2) four 3) six 4) eight Question 21 (1 point) What is the underlying application layer protocol defined for Web browsing? 1) HTTP 2) TCP 3) IP 4) CSMA/CD Question 22 (1 point) Which of the following is unlikely to be a type of access networks? 1) physical access 2) residential access 3) company (Institutional) access 4) wireless (mobile) access Dewan Dan Question 23 (1 point) To obtain the corresponding IP address from a host name, what type of DNS records will be looked up? O 1) type=A 2) type=NS 3) type=CNAME 4) type=MX Previous Page Question 24 (1 point) Which of the following statements is not true for local DNS servers? O 1) ISPs often provide default name servers. 2) A local DNS server performs like a proxy. 3) A local DNS server maintains a local cache to speed up. O 4) A local DNS server provides publicly accessible DNS records that map the names of the hosts within the organization to IP addresses