[单选] You are creating a Windows Communication Foundation (WCF) service that responds using plain-old XML (POX).You have the following requirements: You must enable the /catalog.svc IItems operation to respond using the POX, JSON, or ATOM formats. You also must ensure that the same URL is used regardless of the result type. You must determine the response format by using the Accepts HTTP header.What should you do?（）

You are a network administrator of a large investor relations company that uses a switchednetwork to carry both data and IP telephony services. Why should you carry voice traffic on aseparate VLAN？（） IP phones require inline power and must be in separate VLAN to receive inline power。 IP telephony applications require prioritization over other traffic as they are more delaysensitive。 IP phones can only receive IP addresses through DHCP if they are in separate VLAN。 The CDP frames from the IP phone can only be recognized by the switch if the phone is in anauxiliary vla。 饲料和饲养学的学习目的？ 寿险与健康险的核保因素？ 普通FTP服务要求用户在登录时提供正确的用户名和密码。 影响土的渗透性的因素 You are creating a Windows Communication Foundation (WCF) service that responds using plain-old XML (POX).You have the following requirements: You must enable the /catalog.svc IItems operation to respond using the POX, JSON, or ATOM formats. You also must ensure that the same URL is used regardless of the result type. You must determine the response format by using the Accepts HTTP header.What should you do?（）