多选题VOIP has been implemented at the main office of the Company network. Which two statements  are true about voice packets in a LAN？（）AVoice carrier stream utilizes Real-Time Transport Protocol (RTP) to carry the audio/media  portion of the VoIP communica

第1题：

VOIP has been implemented at the main office of the Company network. Which two statements  are true about voice packets in a LAN？（）

• A、 Voice carrier stream utilizes Real-Time Transport Protocol (RTP) to carry the audio/media  portion of the VoIP communication.  
• B、 Voice traffic data flow involves large volumes of large packets.  
• C、 Because a packet loss involves a small amount of data, voice traffic is less affected by packet  losses than traditional data traffic is.  
• D、 Voice packets are encapsulated in TCP segments to allow for proper sequencing during  delivery. 
• E、 Voice packets are very sensitive to delay and jitter. 

第2题：

A branch office of Acme Insurance has 15 IP phones connected to the main office using the distributed call processing model. Normally， the phones work with great quality. However， during very busy times when all of the agents are on the phone at the same time， the voice quality drops precipitously. Words or phrases or both are dropped from conversations. What is the most likely cause of the problem？（）

• A、large files are being downloaded over the WAN network
• B、IP phone traffic is not being classified correctly
• C、more bandwidth is required for the office LAN
• D、Call Admission Control has not been implemented 
• E、employees are watching videos over the internet
• F、header compression is not being used

第3题：

第4题：

Your company has a main office and a branch office. Users in the branch office report that they are unable o access shared resources in the main office. You discover that computers in the branch office have IP addresses in the range of 169.254.x.x you need to ensure that computers can connect to shared resources in both the main office and the branch office. What should you do？（）

• A、 Configure a DHCP relay agent on a member server in the main office
• B、 Configure a DHCP relay agent on a member server in the branch office
• C、 Configure the Broadcast Address DHCP server option to include the main offices DHCP server address
• D、 Configure the Resource Location Servers DHCP server option to include the main offices server ip addresses.

第5题：

Your company has multiple DNS servers in the main office.You plan to install DNS on a member server in a branch office.You need to ensure that the DNS server in the branch office is able to query any DNS server in the main office, and you need to limit the number of DNS records that are transferred to the DNS server in the branch office.What should you do？（）

• A、Configure a secondary zone on the DNS server in the branch office.
• B、Configure a stub zone on the DNS server in the branch office.
• C、Configure a stub zone on the DNS server in the main office.
• D、Configure a primary zone on the DNS server in the branch office.

第6题：

An expanding company is deploying leased lines between its main site and two remote sites. The bandwidth of the leased lines is 128kb/s each， terminated on different serial interfaces on the main router. These links are used for combined VOIP and data traffic. The network administrator has implemented a VOIP solution to reduce costs， and has therefore reserved sufficient bandwidth in a low latency queue on each interface for the VOIP traffic. Users now complain about bad voice quality although no drops are observed in the low latency queue.What action will likely fix this problem？（）

• A、mark VOIP traffic with IP precedence 6 and configure only ’fair-queue’ on the links
• B、configure the scheduler allocate 3000 1000 command to allow the QoS code to have enough CPU cycles
• C、enable class-based traffic shaping on the VoIP traffic class
• D、enable Layer 2 fragmentation and interleaving on the links
• E、enable Frame Relay on the links and send voice and data on different Frame Relay PVCs

第7题：

Your company has a main office and a branch office. Users in the branch office report that they are unable to access shared resources in the main office. You discover that computers in the branch office have IP addresses in the range of 169.254.x.x you need to ensure that computers can connect to shared resources in both the main office and the branch office. What should you do?（）

• A、Configure a DHCP replay agent on a membe rserver in the main office.
• B、Configure a DHCP repla yagent on a member server in the branch office.
• C、Configure the broadcast addres sDHCP serve roptionto include the main offices DHCP server address.
• D、Configure the resource location servers DHCP serve roption to include the main office serve ipaddresses.

第8题：

第9题：

Your company has a main office and a branch office. The branch office has an Active Directory  site that contains a read-only domain controller （RODC）.   A user from the branch office reports that his account is locked out. From a writable domain  controller in the main office， you discover that the user’s account is not locked out.     You need to ensure that the user can log on to the domain.     What should you do（）

• A、Modify the Password Replication Policy.
• B、Reset the password of the user account.
• C、Run the Knowledge Consistency Checker （KCC） on the RODC.
• D、Restore network communication between the branch office and the main office.

第10题：