多项选择题

Which three authentication options does IS-IS support?（）

A. MD5
B. DES
C. Kerberos
D. unauthenticated
E. simple password

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多项选择题

In which two ways can you influence how downstream LSRs treat MPLS traffic?（）

A. Use an EXP rewrite table.
B. Use a DSCP rewrite table.
C. Statically assign a CoS value to an LDP-signaled LSP.
D. Statically assign a CoS value to an RSVP-signaled LSP.

多项选择题

Which three are well-known mandatory BGP attributes? （）

A. Origin
B. AS path
C. Next hop
D. Community
E. Multiple exit discriminator

单项选择题

How long is an IPv6 address?（）

A. 32 bits
B. 64 bits
C. 128 bits
D. 256 bits