As shown in the figure, all routers run OSPF protocol, and the OSPF process number i5 1 and the area number is 0 Which of the following commands can implement this requirement on Router A? (Multiple Choice)

ATM protocol framework is divided into three basic planes, respectively,

If the configuration information of a router is as follows, which user name and password are used by the peer router to perform PPP link authentication?
aaa
local-user test password cipher test
local-user test service-type ppp
local-user test1 password cipher test1
local-user test1 service-type telnet
local-user test2 password cipher test2
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interface Serial1/0/0
link-protocol ppp
ppp authentication-mode pap
ip address 10.0.12.1 255.255.255.0
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OSI reference model that is

PPP data frame cannot be directly transmitted on the link, link the different PPP data frames transmitted on additional packages and require different control mechanisms. PPP serial link data transmission standard HDLC frame to follow.