Refer to the exhibit. What three statements are true about the IS - IS configuration?()<br /> <img src="https://nimg.ppkao.com/2018-07/yiyu/2018073015191336049.jpg?sign=351964fc24b92485cb48f30bd6de4889&t=62d1e6d3" />
A、The router is in area 49.0001.0002
B、The router acts as a Level 1 - 2 router
C、CLNS routing is enable d for the router
D、The router has a system ID of 0003.0004
E、The interfaces have a functional IS - IS configuration
F、The network service access point selector (NSEL) byte has a value of 0