When using keyboard shortcuts, which keystroke combination allows users to erase a single word to the left of the cursor?（）

A. Ctrl + a
B. Ctrl + e
C. Ctrl + u
D. Ctrl + w

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. 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