【单选题】 E1 carrier rate is ().
【单选题】E1 carrier link multiplexes channels according to TDM. The original analog voice signal is digitized using PCM at a rate of 8000 samples. So,the data rate of E1 is .
【单选题】“常把《汉书》挂牛角,独出郊原更谁与”一诗用了唐代()读汉书的典故。
【多选题】您如何确保一个带有名为Fld1字段的TableB表格里只具有Fld1字段里的那些值,而这些值同时在名为TableA的表格的Fld1字段里?【选2项】
【多选题】Which four statements about the Carrier Supporting Carrier (CSC) feature are true? ()
A.
MPLS is required between the PE and CE routers that connect the backbone carrier to the customer carrier.
B.
The backbone carrier must enable the PE router to check that the packets it receives from the CErouter contain only the labels that the PE router advertised to the CE router.
C.
Every packet that crosses the backbone carrier must be encapsulated so that the packet includes MPLS labels
D.
AII PE routers that link the backbone carrier to the customer carrier must run Route Target Rewrite.
E.
Arouting protocol is required between the PE and CE routers that connect the backbone carrierto thecustomer carrier. The routing protocol enables the customer carrier to exchange IGP routing information with the backbone carrier.
【单选题】Where both the carrier and the actual carrier are liable for compensation,they shall ______ be liable within the scope of such liability.