Practice Free H35-211_V2.5-ENU Exam Online Questions
IP spoofing refers to a malicious user forging () to send messages and launch a network attack.
- A . Protocol Stack
- B . Port number
- C . TCP sequence number
- D . IP address
In a GPON system, when configuring SIP voice services, which SIP local port number is selected by default?
- A . 5063
- B . 5062
- C . 5065
- D . 5060
10G GPON downlink data is transmitted via broadcast, with the downlink data band being broadcast to all ONUs. Line encryption can improve system security. Which of the following statements about line encryption is incorrect?
- A . For sites with high line security requirements, it is highly recommended to use the local encryption function.
- B . To prevent the risk of encryption keys being decrypted, key replacement technology is used, preventing updates to the encrypted key state and ensuring high security.
- C . Line encryption algorithms can cause transmission delays.
- D . Line encryption algorithms do not increase the load or consume bandwidth.
The protocol used to manage multicast membership is ().
- A . IGMP
- B . PIN-SH
- C . PIN-DH
- D . MSDP
In a GFON network, when a LOSi/LOBi alarm is generated, which of the following is NOT a possible cause for this alarm?
- A . OT hardware failure
- B . Fiber optic cable breakage
- C . Deterioration of optical path quality
- D . Optical module failure
After the ONU is powered on, the OLT cannot automatically detect the unconfigured ONU. What is the most unlikely reason?
- A . There is a rogue ONU that interferes with other ONUs, preventing them from working properly.
- B . The actual distance between the ONU and the OLT is outside the range of the ranging compensation distance configured for the OLT.
- C . ONU hardware failure
- D . ONU ID not planned
What are some possible reasons for screen flickering/ghosting when watching IPTV programs? (Multiple choice)
- A . The equipment has a speed limit.
- B . The power output of the equipment is at a critical value.
- C . Some keyframes were lost during program compression.
- D . Some keyframes were lost during the transmission process.
When a user attempts to connect to the network via PPPoE dial-up, they encounter an "Error 678" dial-up failure and are unable to obtain an IP address. Possible reasons include ().
- A . No user address pool is configured on the BRAS1 side.
- B . LCP negotiation failed.
- C . Username or password incorrect
- D . Too many users accessing the OLT service port
Which of the following descriptions of the Type protection group member status are correct? (Multiple choice)
- A . Protect
- B . Work
- C . Active
- D . Standoy