Layer 3 （the network layer） provides connectivity and path selection between two host systems that may be located on geographically separated networks. Which two devices operate at the network layer？（）

单项选择题WhatistheprimarypurposeofSMBSmartDesigns？（）

A. assists in locating appropriate resources
B. provides training on products， tools， and solutions
C. provides a direct support path for any partner issue
D. provides validated commercial solutions
E. provides a step-by-step outline of implementation tasks required

多项选择题TheCiscoSA500SeriesSecurityAppliancesarebuiltspecificallyforbusinesseswithlessthan100employees.Whatarethreeimportantbenefitsofthisdevice？（）

A. site-to-site VPN for remote offices
B. business-grade firewall
C. Cisco IOS software-based
D. email security
E. XML support
F. premium support via SMARTnet

单项选择题WhichcombinationofportsisavailableontheCiscoSPA8800voicegateway？（）

A. four station ports and four trunk ports （4xFXS and 4xFXO）
B. two station ports （2xFXS）
C. eight station ports （8xFXS）
D. one station port and one trunk port （1xFXS and 1xFXO）

多项选择题QoSreferstotheabilityofanetworktoprovideimprovedservice，overvariousunderlyingtechnologies，toselectnetworktraffic.WhichtwotraitsareinherenttoQoS？（）

A. reference to network ability to provide improved service to all network traffic
B. reduction in delay， jitter， and packet loss
C. equal handling of all packets
D. support for real-time applications
E. best-effort actions

多项选择题CiscoConfigurationAssistantsupportsavarietyofvirtualprivatenetworks.WhichthreetypesofVPNcanbeconfiguredbyusingCCA？（）

A. DMVPN
B. MPLS VPN
C. IPv6 VPN
D. Cisco IOS SSL VPN
E. site-to-site VPN
F. Cisco Easy VPN