please try do all question CSCI 434

Question 4 (1 point) Which of the following statements is true? 1) Circuit switching is better for providing specified quality of service than packet switching 2) Circuit switching is better for handling bursty traffic (with highly variable data rates) than packet switching. 3) Packet switching reserves network resources for an end-to-end communication for guaranteed service. 4) With packet switching, packet loss does not occur by using a dedicated end- to-end connection between two hosts. Question 5 (1 point) Which of the following DNS RR types is used for mail servers? 1) type=A 2) type=NS = 3) type=CNAME 4) type=MX Question 6 (1 point) sends a significant number of packets to the target host. 1) Bandwidth flooding 2) Connection flooding 3) Vulnerability attack 4) Sniffing attack Question 7 (1 point) On what condition packet loss occurs? 1) packet arrival rate > packet departure rate 2) packet arrival rate propagation delay 4) transmission delay