单选题Which code causes only a Level 2 adjacency to be formed under the SONET interface so-2/2/2 with Frame Relay encapsulation？（）A so-2/2/2 { unit0 { disable familyiso }}B isis{ level1 disable； interfaceso-2/2/2.0 { disable } interfaceall；C so-2/2/2 { unit0
题目
单选题
Which code causes only a Level 2 adjacency to be formed under the SONET interface so-2/2/2 with Frame Relay encapsulation？（）
A
so-2/2/2 { unit0 { disable familyiso }}
B
isis{ level1 disable； interfaceso-2/2/2.0 { disable } interfaceall；
C
so-2/2/2 { unit0 { disablelevel 1； familyiso }}
D
isis{ level1 disable； interfaceall； }