JN0-120
单选题What is the functionality of L2TP in a BRAS environment?（）A It tunnels DHCP requests to the LNS.B It provides access for analog modem users.C It provides RFC 2547 VPN services to the user.D It tunnels a PPP session across an IP backbone.
题目
It tunnels DHCP requests to the LNS.
It provides access for analog modem users.
It provides RFC 2547 VPN services to the user.
It tunnels a PPP session across an IP backbone.
参考答案和解析
相似问题和答案
第1题：
A.It tunnels DHCP requests to the LNS.
B.It provides access for analog modem users.
C.It provides RFC 2547 VPN services to the user.
D.It tunnels a PPP session across an IP backbone.
第2题：
A.It allows L2F tunnels across the network.
B.It allows GRE tunnels across the network.
C.It allows PPTP tunnels across the network.
D.It allows PPP to be tunneled across a network
第3题：
Your network contains a Routing and Remote Access server named RRAS1 and a DHCP server named DHCP1. RRAS1 and DHCP1 are located in different subnets.RRAS1 is configured to support VPN connections from the Internet. DHCP1 has a scope that provides IP addresses for the VPN connections.You need to ensure that VPN clients that connect to RRAS1 can receive IP addresses from DHCP1.What should you do？（）
A. On DHCP1, configure a DHCP Relay Agent.
B. On DHCP1, install the Routing role service.
C. On RRAS1, configure a DHCP Relay Agent.
D. On RRAS1, install the Routing role service.
第4题：
Access Point R1 is an Aironet 1200 that has been converted from autonomous mode to LWAPP mode. After this conversion， which two statements are true？ （）
- A、 LWAPP-enabled access points can still communicate with Wireless Domain Services （WDS） devices.
- B、 An LWAPP-enabled access point console port provides read-only access to the unit.
- C、 LWAPP-enabled access points support Layer 2 LWAPP.
- D、 LWAPP-enabled access points must get an IP address and discover the controller using DHCP， DNS， or an IP subnet broadcast.
- E、 An LWAPP-enabled access point console port provides read-write access to the unit.
正确答案:B,D
第5题：
A.can be used over analog circuits
B.maps Layer 2 to Layer 3 address
C.encapsulates several routed protocols
D.supports IP only
E.provides error correction
第6题：
A.It initiates both the PPP session and the tunnel.
B.It initiates the PPP session and terminates the tunnel.
C.It terminates the PPP session and initiates the tunnel.
D.It terminates the PPP session and terminates the tunnel.
第7题：
A. can be used over analog circuits
B. maps Layer 2 to Layer 3 address
C. encapsulates several routed protocols
D. supports IP only
E. provides error correction
第8题：
In the open systems interconnection (OSI) reference model, "layer" means one of seven conceptually complete,(71) arranged groups of services, functions, and protocols, that extend across all open systems.Application layer provides means for the application(72) to access the OSI environment. Presentation layer provides for the selection of a common syntax for representing data.(73) layer provides the means necessary for cooperating presentation entities to organize and synchronize their dialog and to manage their data exchange. Transport layer provides a reliable end-to-end data transfer service. Network layer provides for the entities in the transport layer the means for transferring blocks of data, by(74) and switching through the network between the open systems in which those entities reside. Data link layer provides services to transfer data between network layer entities. Physical layer provides the mechanical, electrical, functional, and procedural means to establish, maintain and(75) physical connections for transfer of bits over a transmission medium.
A．rankly
B．levelly
C．layered
D．hierarchically
第9题：
What does qos pre-classify provides inregardto implementing QoS over GRE/IPSec VPN tunnels？（）
- A、 enables IOS to copy the ToS field from the inner （original） IPheader to theouter tunnel IP header
- B、 enables IOS to make a copy of the inner （original） IP header and to run a QoS classification before encryption， based on fields in the inner IP header.
- C、 enables IOS to classify packets based on the ToS field in the inner （original） IP header
- D、 enables IOS to classify packets based on the ToS field in the outer tunnel IP header
- E、 enables the IOS classification engine to only see a single encrypted and tunneledflow to reduce classification complexity
正确答案:B
第10题：
Which of the following are key characteristics of PPP (Choose three.)（）。
- A、can be used over analog circuits
- B、maps Layer 2 to Layer 3 address
- C、encapsulates several routed protocols
- D、supports IP only
- E、provides error correction
正确答案:A,C,E