Please match the Cisco STP enahancement term to its definition.（）
(1) BPDU guard
(2) PortFast
(3) BackboneFast
(4) Loop guard
(5) Root guard
(a) shuts down a port that receives a BPDU when enabled
(b) cuts convergence time by mas-age for indirect failure
(c) prevents the aliernate or root port from being designated in absence of BPDUs
(d )causes Layer 2 LAN interface access port to immediately enter the forwarding state
(e) helps prevent bridging loops due to jni-directional link failures on point-to-point links

单项选择题You are the Cisco Network Designer . Which is not major scaling, sizing, and performance consideration for an IPsec design?（）

A. connection speed
B. number of remote sites
C. features to be supported
D. types of devices at the remote site

单项选择题You are the network consultant from pass4sure.com. One of your customer has six sites, three of which process a large amount of traffic among them. He plans to grow the number of sites in the future. Which is the most appropriate design topology?（）

A.full mesh
B.peer-to-peer
C.partial mesh
D.hub and spoke

单项选择题Please match the Cisco NAC appliance component to its description.（） (1)Cisco NAS (2)Cisco NAA (3)Rule-set Lpdates (4)Cisco NAM (a) a centralized management point (b) an in-band cr out-of-band device for network access control (c) a Windows-based client which allows network access based on the tasks running (d) a status crecker for operating systems,antivirus,antispyware,etc.

A.（a）-（4）；（b）-（1）；（c）-（2）；（d）-（3）
B.（a）-（3）；（b）-（2）；（c）-（4）；（d）-（1）
C.（a）-（4）；（b）-（3）；（c）-（1）；（d）-（2）
D.（a）-（2）；（b）-（4）；（c）-（3）；（d）-（1）

多项选择题Refer to the exhibit. Which two statements about the topologies shown are correct?（）

A. Design 1 is a looped triangle design.
B. Design 2 is a looped triangle design.
C. Design 2 achieves quick convergence using RSTP.
D. Both designs supportstateful services at the aggregation layer.
E. Design 2 is the most widely deployed in enterprise data centers.

单项选择题What is the term for a logical SAN which provides isolation among devices physically connected to the same fabric?（）

A.ISL
B.IVR
C.VoQ
D.VSANs
E.Enhanced ISL