單項選擇題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？（）

A. network
B. application
C. session
D. data link


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2.多項選擇題Which two WAN interfaces does the Cisco SRP 520 Series support？ （）

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

3.多項選擇題What are three features that are included with the purchase of a Cisco SA 520？ （）  

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

4.多項選擇題Which three post-sales Smart Design documents are available to help you better serve your customers？ （）  

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

5.單項選擇題What is the difference between Cisco Catalyst 2960 LAN Base Series and Cisco Catalyst 2960 LAN Lite Series？（）  

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

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