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1.
What advantages does IGMPv2 have over IGMPv1?
2.
Which of the following operations can implement fast fault detection on a multicast network?
3.
Which of the following attacks are DoS (Denial of service) attacks?
4.
A Local Area Network Denial (LAND) attacker sends a SYN packet in which the source and destination addresses are the same as the target host's address and the source port is the same as the destination port. While the receiver waits for the final ACK packet from the sender, the connection is in half-connected mode, which wastes limited TCP resources at the receive end.
5.
Which of the following is not included in a digital certificate?
6.
Which of the following are single-packet attacks?
7.
A bookstore provides a wired network for customers to learn online. However, some users are suddenly unable to access the network. After troubleshooting, it is found that all the IP addresses in the DHCP address pool have been used up. Which of the following is the best way to solve the problem?
8.
Assume that the traffic shaping rate is set to 100 Mbit/s on an interface and that the input bandwidth and PIR of each service are configured as shown in the table below.
What is the bandwidth allocated to the EF queue after the first round of scheduling?
What is the bandwidth allocated to the EF queue after the first round of scheduling?
9.
The network administrator defines a traffic policy as follows:
The router port to which the traffic policy is applied has been idle for about 10 seconds. In this case, if there is suddenly a large amount of c1 burst traffic, what is the number of bytes in the green packets?
The router port to which the traffic policy is applied has been idle for about 10 seconds. In this case, if there is suddenly a large amount of c1 burst traffic, what is the number of bytes in the green packets?
10.
Which of the following type of SNMP messages sent to the NMS is reliable?