A computer is connected to the network through a NIC， which has a unique assignment that is called the Ethernet MAC address. Which layer of the OSI model does the MAC address use to communicate with the network？（）

多项选择题AddresstranslationisanothercomponentofLayer3design.WhichtwotypesofaddresstranslationallowanIPAddresstobeduplicated？（）

A. PAT
B. CAT
C. NAT
D. DAT
E. FAT

多项选择题WhichtwoWANinterfacesdoestheCiscoSRP520Seriessupport？（）

A. passive optical network （PON）
B. serial
C. Fibre Channel
D. Fast Ethernet
E. ADSL2+

多项选择题WhatarethreefeaturesthatareincludedwiththepurchaseofaCiscoSA520？（）

A. Cisco Intrusion Prevention System
B. DMZ
C. business-grade firewall
D. Cisco Small Business Pro Service
E. VPN capabilities
F. ProtectLink Gateway

多项选择题Whichthreepost-salesSmartDesigndocumentsareavailabletohelpyoubetterserveyourcustomers？（）

A. Quick Quoting Tool
B. Smart Business Communications System
C. Overview Presentation
D. Cisco Configuration Assistant
E. Solution Profile
F. Small Business Product Guide

单项选择题WhatisthedifferencebetweenCiscoCatalyst2960LANBaseSeriesandCiscoCatalyst2960LANLiteSeries？（）

A. Only the Cisco Catalyst 2960 LAN Base Series offers enhanced Layer 2+ intelligent LAN services.
B. Only the Cisco Catalyst 2960 LAN Lite Series supports Power over Ethernet.
C. Only the Cisco Catalyst 2960 LAN Base Series can be managed by Cisco Network Assistant.
D. Only the Cisco Catalyst 2960 LAN Lite Series supports Gigabit Ethernet uplinks