You are the network administrator for your company. The network consists of a Windows Essential Business Server 2008 environment. You install Forefront Threat Management Gateway (TMG) on the Security Server.
The developers need to access foreign language training programs from an e-learning site on the Internet. The modules of these training programs are typically non-streaming audio files. The site also contains some less-used larger video files that are over 15 MB in size. The audio files are relatively smaller, around 1 MB in size.
To provide faster access to the audio files, you configure a cache drive on EBS-TMG1 and create a cache rule on EBS-TMG1. You observe that even the bigger video files are also cached. You need to prevent the larger video files from being cached. You need to ensure that the cache drive is used optimally and only caches the smaller files.
What should you do?
A.
Configure the Maximum cache size option.
B.
Decrease the Time-To-Live (TTL) value of the bigger objects.
C.
Modify the cache rule, and specify the size of the objects that can be cached.
D.
Modify the memory parameters, and specify the size of the objects that can be cached in the memory.
Explanation:
You should modify the cache rule and specify the size of the objects that can be cached. The cache drive is used to store the cached content. Cache rules are defined to specify what type of content can be cached. Cache rules can also be used to define how Web information is stored and returned to the users from the cache. You can run the New Cache Rule Wizard to configure cache rules. You can configure the Do not cache objects larger than option on the Cache Advanced Configuration page to specify the size of the objects that can be cached. After you configure the Do not cache objects larger than option, the objects that are larger than the specified size will not be cached.You should not configure the Maximum cache size option. The Maximum cache size option defines the size of the cache drive. The cache drive is used to store the cached content. The Maximum cache size option does not enable you to specify the size of the objects that can be cached.
You should not decrease the TTL value of the bigger objects. Decreasing the TTL value of the larger objects will ensure that these objects do not remain in the cache for a longer time, but this will not prevent the heavier video files from being cached. The value of TTL specifies the amount of time for which the content should remain in the cache before expiring. When a user requests Web content that is stored in the cache and has not expired, Forefront TMG server returns the content to the user from its cache. The users cannot access the content from its original source unless the content in the cache has expired. This sometimes disables the users from viewing the latest updated content. To enable the users to see the most recent version of the site, you should create a cache rule for the Web site Uniform Resource Locator (URL) and then you should enable the Never, no content will ever be cached option on the Cache Content page. The Never, no content will ever be cached option ensures that Forefront TMG server will not cache any of the requested content from that Web site, and will retrieve it from the Web site instead.
You should not modify the memory parameters and specify the size of the objects that can be cached in the memory. You can use memory parameters to specify the maximum size of objects that can be stored in memory or to specify the percentage of available RAM made available for caching. In this scenario, you want to optimize the use of the cache drive and ensure that only smaller files are cached. To do this, you should modify the cache rule you already created.