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工作学习 / 专业技术讨论 / 请教Which of the following is not a Cisco IOS feature that would typically be used for TCP/IP network utilization and security management, choose one of below1. QOS traffic management
2. access-list filtering
3. rate limiting
4. route-maps
5. policy routing
my answer is 3, is that right?
-ivanliuxin(Ivan);
2005-5-14
{157}
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up！
-ivanliuxin(Ivan);
2005-5-14
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5.
-coolj(coolj);
2005-5-16
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why? what does it mean for policy routing? what's the difference between it and ACL?
-ivanliuxin(Ivan);
2005-5-16
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求教，有谁能解释一下吗？
-ivanliuxin(Ivan);
2005-5-17
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My pointFirst of all, I agree with you to choose 3.
The reason I select 3 is based on my understanding of the question. My translation of the question is that "which of the followings is not a typical layer 3 technology for network utilization and security management".
Rate limiting is typically implemented on layer 2 (like Frame Relay), isn't it?
-whynot108(Whynot);
2005-5-17
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yes, I totally agree with you. TCP/IP is working in Layer 3 and 4. But could you clarify what does it mean policy routing? and what's the difference between it and ACL?
-ivanliuxin(Ivan);
2005-5-18
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policy routing overwrites your normal network protocol's forwarding decision.for instance of eigrp, bases on bandwidth, delay and etc to select the next hop but when policy routing is enabled, you specify next hop yourself, kinda like a static route.
acl defines the interesting traffic to trigger policy based routing.
-coolj(酷不起来);
2005-5-19
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Good point. It looks like you read Routing TCP/IP Volume I inside out. :-)
-whynot108(Whynot);
2005-5-19
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it's correct that frame relay is layer2 technology but rate-limit has nothing to do with whether the network medium is packet switched, cell switched or dedicated line.
-coolj(酷不起来);
2005-5-19
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rate-limit is a feature which lets you define how the traffic should be handled, such as limiting bandwidth, prioritize certain ip traffic and etc...
-coolj(酷不起来);
2005-5-19
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also, rate-limit is a good security feature to prevent denial of service attack
-coolj(酷不起来);
2005-5-19
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Sorry, I cann't totally take your point. Could you inform me which reference book you use to get the idea of Rate Limit?
-whynot108(Whynot);
2005-5-19
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