單項(xiàng)選擇題You are the network consultant from Cisco.com. Please point out which Layer 2 access designs does not support VLAN extensions?()

A. Flex Links
B. loop-free U
C. looped square
D. looped triangle



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1.單項(xiàng)選擇題

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

A.(a)-(1);(b)-(2);(c)-(4);(d)-(5);(e)-(3)
B.(a)-(4);(b)-(3);(c)-(2);(d)-(5);(e)-(1)
C.(a)-(3);(b)-(2);(c)-(4);(d)-(5);(e)-(1)
D.(a)-(1);(b)-(3);(c)-(4);(d)-(2);(e)-(4)

2.單項(xiàng)選擇題Which of the following is the primary consideration to scale VPNs?()

A. packets per second
B. number of remote sites
C. throughput bandwidth
D. number of tunnels

3.多項(xiàng)選擇題Which two of these are advantages of placing the VPN device in the DMZ on the firewall?()

A. fewer devices to manage
B. moderate-to-high scalability
C. stateful inspection of decrypted VPN traffic
D. increased bandwidth with additional interfaces
E. decreased complexity as traffic is filtered from the firewall

5.單項(xiàng)選擇題What is the recommended radius of a cell for a voice-ready wireless network?()

A.86dBm
B.67dBm
C.19dBm
D.95dBm

7.單項(xiàng)選擇題Cisco Express Forwarding (CEF) is mainly used to increase packet switching speed, reducing the overhead and delays introduced by other routing techniques, increasing overall performance.Which of the following concerning CEF is recommended by Cisco?()

A. Use default Layer 4 hash in core.
B. Use default Layer 3 hash in distribution.
C. Use default Layer 4 hash in distribution.
D. Use default Layer 3 hash in core and Layer 3 + Layer 4 hash in distribution layer.

8.單項(xiàng)選擇題What will an Easy VPN hardware client require in order to insert its protected network address when it connects using network extension mode?()

A. RADIUS or LDAP
B. an internal router running EIGRP
C. Reverse Route Injection and OSPF or RIPv2
D. the VPN appliance to be deployed in line with the firewall

9.單項(xiàng)選擇題Which of these statements is true of routing protocols in a hub-and-spoke IPsec VPN topology?()

A. EIGRP can summarize per interface.
B. OSPF router databases remain independent.
C. When they are configured with stubs, EIGRP regularly floods the topology.
D. OSPF topology decisions are made independent of hierarchy or area.

10.單項(xiàng)選擇題What amount of cell overlap ensures smooth roaming for wireless endpoints?()

A.5;10%
B.10;15%
C.15;20%
D.20;25%

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