What is also called Type 0 authentication in OSPF on Cisco Routers？（）

单项选择题WhichprotocolandporthavebeenassignedbyIANAforRADIUSauthentication？（）

A.UDP/1812
B.UDP/1813
C.TCP/1812
D.TCP/1813

单项选择题WhichofthefollowingistrueabouttheMPLSheaderanditsEXPfieldsize？（）

A.The MPLS header is 2 bytes，and the EXP field is 3 bits long.
B.The MPLS header is 1 byte，and the EXP field is 3 bits long.
C.The MPLS header is 4 bytes，and the EXP field is 3 bits long.
D.The MPLS header is 3 bytes，and the EXP field is 3 bits long.

多项选择题WhichtwostatementsaretrueaboutRED？（）

A.RED randomly drops packets before the queue becomes full.
B.RED is always useful，without dependency on flow.
C.RED increases the drop rate as the average queue size increases.
D.RED has a per-flow intelligence.

单项选择题WhatisthecommandtoconfigureRSVPtoreserveuptoone-tenthofaGigabitlink，butonlyalloweachindividualflowtouse1MB s？（）

A.ip rsvp bandwidth 100000 1000
B.ip rsvp bandwidth 100000 1
C.ip rsvp bandwidth 10 1
D.ip rsvp bandwidth 1000000 1000

多项选择题WhichthreeprotocolsorapplicationsshouldbeplacedinaclassthatisconfiguredwithWRED？（）

A.HTTP
B.RTP
C.streaming video
D.BitTorrent
E.POP3