A.A voice packet is sent via multiple fixed-length cells; a portion of the last cell is padding, requiring more bandwidth.
B.ADSL typically uses PPPoE encapsulation, which adds additional overhead to each voice packet.
C.A voice packet is sent via multiple fixed-length cells; each cell has about 10% Layer-2 header overhead.
D.IPSec requires additional overhead for the header and hash.
E.ADSL carrier band requires additional bits to be carried over the wire to the DSL Access Concentrator.
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Refer to the exhibit. With an IPSec tunnel established between remote Router A and head-end router B, how can the Service Provider Edge Router identify Voice over IP packets flowing through the IPSec tunnel from a Cisco 7960 IP phone?（）
A.UDP ports 16384 through 32727
B.ESP packets less than 113 byes
C.DiffServ codepoint EF Expedited Forwarding
D.RTP ports 6970 through 6999
Refer to the exhibit. An enterprise's security policy disallows the use of wireless on a Teleworker PC. Choose the most appropriate 830 security feature to use to enforce the security policy.（）
A.802.1X authentication
B.authentication proxy
C.Context Based Access Control
D.Lock and Key authentication
Refer to the exhibit. Available public Internet sites are sometimes used for estimating performance. Which statement regarding their use for estimating VPN performance is correct?（）
A.Throughput results are valid as a value from the Teleworker's home to the corporate site, regardless of the location of the public test server.
B.Throughput results may not be valid due to the public server's location on the Internet and fluctuations based on the use of the public server.
C.Throughput values are not affected by the choice of split tunneling or Internet access through the VPN.
D.Throughput results are unrelated to the Teleworker PC configuration or current PC use.
A.256kbps / 1024kbps
B.256kbps / 1544kbps
C.160kbps / 768kbps
D.384kbps / 384kbps
E.128kbps / 512kbps
A.Process Switching
B.Silicon Switching
C.Cisco Express Forwarding (CEF) Switching
D.Autonomous Switching
A.Access Lists between the inside interface and loopback interface
B.Context Based Access Control
C.Dynamic Host Configuration Protocol
D.Network Address translation
Refer to the exhibit. Given the CPE deployment model, the Enterprise applications shown, and the functions being provided as designated, the appropriate product choice is _____.（）
A.Cisco PIX 501 Firewall
B.Cisco 831 router
C.Cisco 837 router
D.Cisco VPN3002 Hardware Client
E.Cisco SW VPN Client
A.Issue a show policy-map interface command.
B.Assuming Netflow is enabled, issue a show ip cache verbose flow command.
C.Issue a show crypto ipsec session command.
D.Issue a debug qos set command and a terminal monitor command.
A.IP phone extensions for teleworkers must be chosen carefully so not to duplicate campus phone extensions.
B.More security exposure exists due to lack of support for Intrusion Detection System and URL filtering for teleworker originated traffic.
C.Compressed RTP and IPSec are not compatible and result in no bandwidth savings.
D.Broadband modems must support Quality of Service for adequate voice quality.
Refer to the exhibit. The Linksys router in the diagram is performing pNAT (port network address translation). What hash algorithm should you choose and why?（）
A.Use hash MD5 to ensure that IKE works through NAT.
B.Use ah-sha-hmac, as it does not check the integrity of the IP header. The IP header will change due to NAT.
C.Use 3DES, as it will encrypt the IPSec header IP addresses and bypass addressing issues.
D.Use esp-sha-hmac, as it does not check the integrity of the IP header. The IP header will change due to NAT.
最新試題
What characteristics make ADSL the likely choice among DSL technologies for Teleworker?（）
A corporation is not concerned about wireless use by Teleworkers. Authentication for any application first requires access via a web browser to a protected site. Given these requirements, choose the appropriate security feature to use to enforce the security policy.（）
Refer to the exhibit. Easy VPN operates in two modes. The exhibit represents network extension mode. Choose the best reason for using this mode.（）
What are the DSL-specific factors that require additional bandwidth when supporting Voice-over-IP over an IPSec VPN?（）
Refer to the exhibit. Given the CPE deployment model, the Enterprise applications shown, and the functions being provided as designated, the appropriate product choice is ____.（）
A customer wants to TFTP a new image from the corporate network to Flash on the Teleworker router through the IPSec tunnel. How should you configure the Teleworker router?（）
An Enterprise customer wants to reduce the configuration effort for their Teleworker router deployments. What is one way to simplify the IPSec-related configuration in the remote routers?（）
When is an IPSec SA built on the Teleworker Router?（）
A customer indicates they run a mission-critical application which marks its packets best-effort (DSCP=0). How can you guarantee delivery of this traffic?（）
Refer to the exhibit. Given this DSL router's sub-interface configuration, select the two true statements. Assume the interface is UP/UP.（）