Which of following statements is true about IS-IS LSP fragment extension?
A . The IS-IS LSP fragment extension function allows an IS-IS router to generate more LSP fragments to carry more IS-IS information.
B . IS-IS LSP fragment extension also takes effect for Hello packets.
C . IS-IS LSP fragment extension is implemented by adding virtual systems. The IS-IS LSP fragment can be extended into a maximum of 1000 virtual systems.
D . IS-IS routers can generate a maximum of 1024 fragments.
Answer: A