Which three statements about IS-IS are true? (Choose three.)
A.
IS-IS is not encapsulated in IP.
B.
IS-IS is directly encapsulated in the data link layer.
C.
0XFEFE is used in the Layer 2 header to identify the Layer 3 protocol.
D.
IS-IS uses protocol ID 93.
E.
IS-IS can be used to route the IPX protocol.
F.
IS-IS is an IETF standard.
IS-IS is an Interior Gateway Protocol (IGP) for routing OSI. IS-IS packets are not encapsulated in
CLNS or IP but are encapsulated directly in the data-link layer. The IS-IS protocol family is OSI,
and values such as 0xFE and 0xFEFE are used by the data-link protocol to identify the Layer 3
protocol as OSI.
Reference.
http://www.cisco.com/en/US/products/ps6599/products_white_paper09186a00800a3e6f.shtml