QoS
Trunking
Spanning
VoIP
第1题：
A.QoS
B.Trunking
C.Spanning
D.VoIP
第2题：
Which object may be used during query optimization to improve the performance for a subset of SELECT queries?（）
第3题：
A.Telnet
B.SMTP
C.SIP
D.SNMP
第4题：
A second network card in a server that activates if the primary card fails is an example of which of the following network performance optimization?（）
第5题：
Which of the following are functions that are often provided by an ITSP but are not typically provided by the PSTN？（）
第6题：
A.Load balancing
B.QoS
C.High availability
D.Fault tolerance
第7题：
Which of the following is primarily used for VoIP?（）
第8题：
A.TLS
B.RDF
C.NTP
D.RTP
第9题：
Which of the following is a performance optimization technology?（）
第10题：
Which of the following protocols is commonly used for VoIP technology?（）