| Date of Issue: 02-01-2023 | Rate this Study Guide |
Question 1.
You are running CQ on IOS 12.1 on a 1-Mbps circuit. You have allocated 3000 bytes to FTP, 1000 bytes to Telnet, 4000 bytes to HTTP, 1000 bytes to NNTP, and 1000 bytes to SMTP. How much bandwidth will HTTP receive?
| a) | 30% |
| b) | 10% |
| c) | 40% |
| d) | 20% |
Question 2.
If all RSVP reservable bandwidth is reserved on an interface, will routing updates get through?
| a) | Yes. RSVP automatically creates a special reservation for system-priority traffic. |
| b) | No |
| c) | Yes, if you manually configure a reservation for this traffic. |
| d) | Yes, but through a mechanism other than RSVP. |
Question 3.
If queue service delay is preventing you from reaching your VoIP delay goal, and you have a mixture of VoIP, FTP, SMTP, HTTP, and NNTP, what is the safest method to make sure the VoIP gets through and still give some bandwidth to the other services? Assume you are running over FR.
| a) | Implement LLQ |
| b) | Reduce MTU |
| c) | Implement fair queuing |
| d) | Implement Frame Relay fragmentation |
Answers
Question 1.
You are running CQ on IOS 12.1 on a 1-Mbps circuit. You have allocated 3000 bytes to FTP, 1000 bytes to Telnet, 4000 bytes to HTTP, 1000 bytes to NNTP, and 1000 bytes to SMTP. How much bandwidth will HTTP receive?
| a) | 30% |
| b) | 10% |
| c) | 40% |
| d) | 20% |
| c) | 40% |
Explanation
Add up the byte counts and you will get a total of 10,000 bytes. 4000 bytes is 40%.
[5108]
Question 2.
If all RSVP reservable bandwidth is reserved on an interface, will routing updates get through?
| a) | Yes. RSVP automatically creates a special reservation for system-priority traffic. |
| b) | No |
| c) | Yes, if you manually configure a reservation for this traffic. |
| d) | Yes, but through a mechanism other than RSVP. |
| d) | Yes, but through a mechanism other than RSVP. |
Explanation
You can only allocate 75% of the bandwidth on an interface to RSVP. The remaining 25% will go to best-effort service.
The BE service will transmit queued traffic in order of priority. Since routing updates have the highest priority, it is guaranteed to transmit them after the RSVP queues are serviced.
[5096]
Question 3.
If queue service delay is preventing you from reaching your VoIP delay goal, and you have a mixture of VoIP, FTP, SMTP, HTTP, and NNTP, what is the safest method to make sure the VoIP gets through and still give some bandwidth to the other services? Assume you are running over FR.
| a) | Implement LLQ |
| b) | Reduce MTU |
| c) | Implement fair queuing |
| d) | Implement Frame Relay fragmentation |
| a) | Implement LLQ |
Explanation
Only choice a will guarantee that VoIP will come through, since it uses PQ for one class of traffic. It still will give available bandwidth to the other services under the rules of CBWFQ. The other choices all will help, but they do not guarantee VoIP service.
[5104]
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