What are the characteristics of ATM cells?

• A.ATM cell is 53 bytes of fixed length
• B.The payload is 48 bytes
• C.The header is 5 bytes
• D.Divided into letterhead and payload

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According to the ITU-T G.984.x series of standards, what are the upstream and downstream bandwidths of GPON?

• A.1.25Gbps/1.25Gbps
• B.2.5Gbps/1.25Gbps
• C.2.5Gbps/2.5Gbps
• D.1.25Gbps/2.5Gbps

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Regarding MA5600 Super Vlan and Sub Vlan, which of the following descriptions are correct?

• A.Super VLAN is mainly used to save IP addresses
• B.Super VLAN is different from VLAN in the usual sense. It is just a Layer 3 interface and does not contain physical ports.
• C.Sub VLAN only contains physical ports, and a three-layer VLAN virtual interface can be established.
• D.Sub VLAN types can be: Smart VLAN, MUX VLAN, Standard VLAN.

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Which of the following access network products can provide ADSL access methods?

• A.UA5000
• B.MA5600
• C.MA5300
• D.MA5100

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In the Solaris 10 operating system, when only ordinary users can ftp to the network management server, which file should be modified so that the root user can also remotely ftp to the server?

• A./etc/defaultrouter
• B./etc/ftpusers
• C./etc/system
• D./etc/services

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