CCIE系列認(rèn)證CCIE SP單項(xiàng)選擇題每日一練(2019.01.23)

來源：考試資料網(wǎng)

1 What is the effect of turning on all available downstream carrier tones in a DMT DSL transmissionsystems？（）

2 What is the order of preference for these commands when all of them are applied to one neighbor in theBGP inbound filter direction？（）

3 Which of following is used to periodically multicast by DIS on a LAN to ensure IS-IS link state databaseaccuracy？（）

4 What statement about Transit AS is true？（）

5 BGP best route selection process is based on path attributes.（）