Which statement is true about the comparison of voice traffi

第1题：

Which three statements are true about the data traffic characteristics of voice traffic？ （）

• A、latency must be kept below 150 ms
• B、latency is not a concern as long as jitter is kept below 30 ms
• C、voice packets do not require a specific type of queuing
• D、voice packets are rather small
• E、voice packets require TCP for rapid retransmission of dropped packets
• F、voice packets require a fairly constant bandwidth reserved for voice control traffic as well as forthe voice payload

第2题：

Which statement is true about the capabilities of a voice gateway router？（）

• A、voice gateways with analog interfaces need a gatekeeper to convert analog signals into digital format before voice is encapsulated into IP packets
• B、voice gateways need a gatekeeper to interconnect the VoIP networks the PSTN network
• C、voice gateways with Cisco Unified CallManager Express （CME） can permanently act as a call agent for IP phones
• D、voice gateways equipped with a DSP module can take the role of the call agent during WAN failure.

第3题：

第4题：

Which two statements are true about the configuration of voice VLANs？（）

• A、Static secure MAC addresses can be configured in conjunction with voice VLANs.
• B、PortFast is automatically enabled when voice VLANs are configured.
• C、PortFast must be manually configured when voice VLANs are configured.
• D、Voice VLANs are typically configured on uplink ports.
• E、Voice VLANs are typically configured on access ports.

第5题：

Which three statements are true about terms in a policy?（）

• A、The order of the terms in a policy is irrelevant.
• B、The action is specified in a then statement.
• C、Terms are optional in a policy.
• D、The match condition can be identified with a from statement.
• E、A from statement is mandatory in a term.

第6题：

Which two statements are true about the protocols that are used for transmitting voice traffic？（）

• A、RTP multiplexing is used to keep multiple phone conversations separate
• B、RTP provides end-to-end delivery services for voice traffic
• C、UDP is used to ensure a reliable transmission from sender to receiver
• D、RTP is used to provide resource reservation for the voice stream
• E、UDP provides multiplexing

第7题：

Which statement is true about the comparison of voice traffic with video traffic？（）

• A、 Video conferencing traffic tends to be much more bursty in nature and is more prone to have an impact on other traffic flows.
• B、 Latency requirements are less stringent for video traffic than for voice traffic.
• C、 Video traffic is less sensitive to dropped packets than for voice traffic.
• D、 Video traffic requires the retransmission capabilities of TCP whereas voice uses UDP.
• E、 Voice traffic tends to be much more bursty in nature and is more prone to have an impact on other traffic flows.
• F、 Voice traffic requires the retransmission capabilities of TCP whereas video uses UDP.

第8题：

第9题：

Which statement is true about IBGP routers? （）

• A、They must be fully meshed
• B、They can be in a different AS
• C、They must be directly connected

第10题：

Which statement is true about the comparison of voice traffic with video traffic？（）

• A、video conferencing traffic tends to be much more bursty in nature and is more prone to have an impact on other traffic flows
• B、latency requirements are less stringent for video traffic than for voice traffic
• C、video traffic is less sensitive to dropped packets than for voice traffic
• D、video traffic requires the retransmission capabilities of TCP whereas voice uses UDP
• E、video traffic tends to be much more bursty in nature and is more prone to have an impact on other traffic flows
• F、voice traffic requires the retransmission capabilities of TCP whereas video uses UDP