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Subscriptions support both the multi-level (#) and single level (+) wild card characters.

• (+) Is is a a single level wildcard that matches any name for a specific topic level. We can use this wildcard instead of specifying a name for any topic level in the topic filter.

• (#) Is is a multi level wildcard that we can use only at the end of the topic filter , as the last level and matches any topic whose first levels are the same as the topic levels specified at the left-hand side of the # symbol.

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