According to different operating modes, VPN can be divided into the following types____ .

xz company requires to build its network based on modular enterprise network architecture. Z company in Shenzhen and Xi'an with 1 R & D base, with an office in Beijing and Shanghai ; at 23 with more than capital cities 50 person office ; the 200 has no more than smaller cities 8 people in a small office j There are usually more than 200 market and technical personnel on business trips at any given time .Due to environmental and cost issues, some offices cannot access the headquarters through dedicated lines or packet-switched wide area network connections.According to these circumstances, the network module that Z company should have is ____ .

The main functions of LNS and LAC in L2TP components are ____ .( Choose one or more )

An operator hopes to deploy ADSL ( ADSL2 ) to kill the system in a community with relatively dense users and short transmission distance .Users do not require high bandwidth, and pay more attention to its economy and ease of installation and maintenance.
Based on the above requirements, when choosing ADSL ( ADSL2 ) standard, the ideal is ____ .( Choose one or more )

In BGP MPLS VPN networking, where will the private network label exist in the following locations ?