The EDFA erbium-doped fiber amplifier is a key component of the new generation of optical fiber systems. Which of the following options are correct for the description of its advantages?
Which of the following options are the basic requirements of DWDM system for light source
MPLS is used to label packets instead of IP forwarding. Which of the following descriptions about MPLS packet encapsulation are correct?
Which of the following descriptions about the Optix OSN 9800 subrack are correct?
The ETH_UWK_DOWN alarm indicates that the network port connection is faulty. The possible reasons do not include which of the following?
Linear multiplexing section can be deployed for STM-1 interface in PTN network. What are the following overhead bytes used to transmit APS automatic protection switching protocol?
Which of the following technologies is used in the dynamic BGP MPLS L3VPN to distinguish the same IP address in different VPNs in the BGP protocol?
In the WDM transmission system, the main factors that affect the unevenness of the power balance of each channel do not include the following?
When PTN carries LTE services, it forwards packets based on MPLS label switching. In the MPLS label, which identification field can be used as a PTN to distinguish the label
at the bottom of the stack?
Which of the following network element forms supports the functions of branch and line, cross-multiplexing between lines and lines, and service adding and dropping functions?
Which of the following items belong to the debugging work of the playback system?
When performing single-site commissioning of SDH equipment, it is necessary to check the single-site hardware: including cabinet and subrack installation inspection, power line resistance measurement, cable layout specification
inspection, single-board appearance inspection, and some single-board inspections. DIP jumper check
Which of the following boards can be inserted into the OSN 9800U64 subrack?
When configuring LMSP, there are two switching modes: single turbulent cutting and inserting and double full switching. Single-ended switching does not require self-use protection
During the normal operation of the network, the service channel protected by ODUK SNCP generates a condition for triggering protection switching, and the service has been automatically switched to the protection channel. When the fault
of the working channel is eliminated, the service cannot be automatically restored to the working channel.
Regarding the comparison of Raman amplifiers with EDFAs, which of the following statements is false?
In the NG-WDM system, which of the following boards supports optical line protection?
The DWDM system has extremely high requirements on the stability of the light source. Which of the following factors will affect the stability of the light source?
Which of the following is the destination MAC address of the Layer 2 header of the data received by the PTN960 from the LTE base station?
Both the 1310nm and 1550nm transmission windows are low-loss windows. In the DWDM system, only the 1550nm transmission window is used. Which of the following options is the main reason?
In the MPLS label field of the PTN network, which item is the identification field of the stack bottom label?
Which of the following are the possible reasons for the disconnection of network elements?
In the PHBÌ‚ category of common FTN service flows, which of the following corresponds to the voice service?
When creating a static tunnel, you need to specify the interface of the next hop. Which is the displayed address of the next hop?
Which of the following is not included in the function of the Inspector inspection tool?
When the data link layer of a router (IP forwarding) receives a packet whose length is greater than the maximum MTU of the interface that the router will send out, which of the following strategies is adopted?
When deploying ring network protection in the PTN7900 network, which items are wrong?
The ARP protocol is a broadcast-based protocol through which the host can dynamically discover the MAC address corresponding to an address.
Which of the following protection types is not supported by the L302 board?
Which of the following statements about the advantages of QinQ is correct?
In the MPLS-TPOAM architecture of PTN equipment, what are the functions of network performance maintenance?
The M40 board has 2 waves of access, and the power of each wave is -4dBm. So which of the following values is the power of the M40 output port? (M40 insertion loss is 6.5dBm)
IP As the core protocol of the network layer in the TCP/IP protocol stack, the fixed part of the packet header has 20 bytes and carries a variety of identification fields to define the transmission of the data packet.
Which of the following statements about the identification field is incorrect?
NE1 and NE2 are the intersection nodes of the SNCP ring and the SNCP ring. How many SNCP protection groups and how many unidirectional cross-connects should be configured on NE1.
Which of the following is correct?
Which of the following 7900 single-board software function descriptions are correct?
Which of the items are unreasonable to configure the default route on the PTN device in the LTE solution?
Which of the following detection methods can locate the fault point of LSP?