多选题Which three mechanisims support the forwarding plane of a Layer 3 VPN in JUNOS software? （）AMPLS LSPBATM tunnelCGRE tunnelDIPSEC tunnelEL2TPv3 session

第1题：

第2题：

Which statement is true regarding the forwarding plane?（）

• A、The forwarding plane is contained within the Routing Engine (RE)
• B、The forwarding plane processes and evaluates exception traffic
• C、The forwarding plane contains the Packet Forwarding Engine (PFE)
• D、The forwarding plane is not present on all platforms running the Junos OS

第3题：

第4题：

In JUNOS software, unclassified packets are associated with which forwarding class?（）

• A、network control
• B、best effort
• C、assured forwarding
• D、expedited forwarding

第5题：

Which three MPLS statements are true？（）

• A、Cisco Express Forwarding （CEF） must be enabled as a prerequisite to running MPLS on a Cisco router.
• B、Frame-mode MPLS inserts a 32-bit label between the Layer 3 and Layer 4 headers.
• C、MPLS is designed for use with frame-based Layer 2 encapsulation protocols such as Frame Relay， but is not supported by ATM because of ATM fixed-length cells.
• D、OSPF， EIGRP， IS-IS， RIP， and BGP can be used in the control plane.
• E、The control plane is responsible for forwarding packets.
• F、The two major components of MPLS include the control plane and the data plane.

第6题：

Which three functions are provided by JUNOS Software for security platforms？（）

• A、VPN establishment
• B、stateful ARP lookups
• C、Dynamic ARP inspection
• D、Network Address Translation
• E、inspection of packets at higher levels （Layer 4 and above）

第7题：

Which two statements describe the difference between JUNOS Software for securityplatforms and a traditional router？（）

• A、JUNOS Software for security platforms supports NAT and PAT； a traditional router does not support NAT or PAT.
• B、JUNOS Software for security platforms does not forward traffic by default； a traditional router forwards traffic by default.
• C、JUNOS Software for security platforms uses session-based forwarding； a traditional router uses packet-based forwarding.
• D、JUNOS Software for security platforms performs route lookup for every packet； a traditional router performs route lookup only for the first packet.

第8题：

第9题：

Which two functions of JUNOS Software are handled by the data plane？（）

• A、NAT
• B、OSPF
• C、SNMP
• D、SCREEN options

第10题：

What are two components of the JUNOS Software architecture？（）

• A、Linux kernel
• B、routing protocol daemon
• C、session-based forwarding module
• D、separate routing and security planes