Sniffing attack
Denial of service attack
Port Scan attack
Reconnaisance attack
Spoofing attack
第1题：
A. establish starting at the egress router going back to the ingress router
B. establish starting at the ingress router going downstream to the egress router
C. establish when a router learns of a new prefix
D. establish when the path correctly matches the reverse path forwarding check
第2题：
A.FilterSmurfICMPpackets.
B.Filterasclosetothecoreaspossible
C.Filterasclosetotheedgeaspossible
D.Filteraspreciselyaspossible
E.Filterbothsourceanddestinationwherepossible
第3题：
A. I/O module
B. switch fabric
C. egress line module
D. ingress line module
第4题：
Which QoS model manages the QoS requirements for the network on a per-hop behavior （PHB） basis？（）
第5题：
A.RFC1149
B.RFC3704
C.RFC1918
D.RFC2827
第6题：
The router SIS-R has been configured in a CIS network. As a network administrator, you were required to enable MPLS on that router.Which of the following description is making sense on the basis of the output information?（）
A. CEF switching is only needed to forward labeled packets.
B. CEF switching is needed on both ingress and egress interfaces on which MPLS is enabled.
C. Interface-level CEF switching is needed only on egress interfaces that are sending IP packets on which the egress LSR performs the label imposition process.
D. Interface-level CEF switching is needed only on ingress interfaces that are receiving IP packets on which the ingress LSR performs the label imposition process.
第7题：
A.Sniffingattack
B.Denialofserviceattack
C.PortScanattack
D.Reconnaisanceattack
E.Spoofingattack
第8题：
A. reverse path of the RRO
B. least cost to the ingress router
C. shortest path to the egress router
D. reverse path of the path vector TLV
第9题：
A.PreventsDoSfromlegimate，non-hostileendsystems
B.Preventsdisruptionof"specialservices"，suchasMobileIP
C.DefeatsDoSAttackswhichemployIPSourceAddressSpoofing
D.Restrictsdirectedbroadcastsattheingressrouter
E.AllowsDHCPorBOOTPpacketstoreachtherelayagentsasappropriate
第10题：
On Cisco Nexus 5000 Series Switches， where are the virtual output queues implemented， and what is the main purpose of virtual output queues？（）