将同类指标不同时期的数值进行对比，求出比率，以分析该项指标的发展方向和发展速度的方法是（)。A

A. Exception traffic is only handled by the PFE

B. Exception traffic is rate-limited across the internal link to protect the RE

C. Exception traffic is not prioritized during times of congestion

D. Exception traffic is forwarded based on forwarding table entries

A. Transit traffic is handled by the RE only

B. Transit traffic is handled by the PFE only

C. Transit traffic is handled by both the RE and the PFE

D. Transit traffic is not handled by the RE or the PFE

A. to maintain routing tables

B. to forward traffic toward its destination

C. to manage the PFE

D. to implement various services such as policing, stateless firewall filtering, and class of service

A. Exception traffic must be sent to the PFE for processing.

B. Exception traffic enters one ingress port and is sent out multiple egress ports.

C. Exception traffic is rate-limited on the internal link to prevent DoS attacks.

D. Exception traffic is processed after forwarding traffic when congestion exists.

The two examples in the second and third paragraphs intend to show that______.

A．Naples has a high incidence of traffic accidents

B．anything extraordinary can happen in Naples

C．people there love to store food for years

D．everything appears to be on the wrong side

What are examples of good subjects？ (More than one correct answer)

A.ACME

B.We’re going for lunch at 1 p.m.

C.ACME Corp. | HR Portal | draft of functional documentation, v. 0.1

D.Please, send your report—deadline: March 10th

A. to identify traffic that should be dropped

B. to classify traffic

C. to identify traffic that should receive common treatment

D. to assign traffic to output queues

听力原文：What are the two speakers talking about？

(12)

A．A traffic accident.

B．A damaged store.

C．A fight in the street.

D．A dead driver.

Different trees are mentioned in Paragraph Two as examples to

A．set a criterion as to what are ancient trees.

B．introduce the rich species of ancient trees.

C．compare different kinds of ancient trees.

D．explain the definition of ancient trees.

A．LAN

B．QoS

C．traffic

D．IPSec