A new router was configured with the following commands： The configuration above was found on an Internet Service Provider’s （ISP） Multiprotocol LabelSwitching （MPLS） network. What is its purpose？（）

• A、To prevent customers from running TDP with the ISP routers
• B、To prevent customers from running LDP with the ISP routers
• C、To prevent other ISPs from running LDP with the ISP routers
• D、To prevent man-in-the-middle attacks
• E、To use CBAC to shut down Distributed Denial of Service attacks
• F、To use IPS to protect against session-replay attacks
• G、None of the above