Online Access Free GB0-391 Exam Questions

Congestion occurs in the outbound direction of a certain interface of a certain device.It is observed that the traffic of all its TCP connections continues to oscillate at the same frequency, and the average utilization rate of bandwidth is greatly reduced.In order to solve the problem of low bandwidth utilization, the ______ technology cannot be used .

• A.Tail discard
• B.WRED
• C.LR
• D.RED

Which of the following are information signaling ____ .

• A.by the user using the phone, pressing the number keys to PBX transmits the called number representing a series of low and high audio frequencies of the audio frequency.
• B.by the user when using the phone, pick up the telephone handset, the handset came from the dial tone.
• C.by the user using the phone, pick up the telephone handset called number, called the ellipsoid of the ringing telephone.
• D.used when the user using the telephone, after the telephone handset from the chamber called number, outgoing handset to ring back tone.

The following commands are configured on the S3610 switch:
qos map-table dot1p-lp
import 1 export 5
import 2 export 4
interface Ethernet1/0/8
port link-mode bridge
port link-tpe trunk
port trunk permit vlan 1 4
qos trust dot1p
interface Ethernet1/0/9
port link-mode bridge
port link-tpe trunk
port trunk permit vlan 1 4
qos gts an cir 65000 cbs 2000000
Then when the flow rate is 40Mbps the vlan id is 4 and the 802.1p priority to 1 of packets, and a flow rate of 40Mbps is vlan id is 4 and the 802.1p priority 2 packets simultaneously from the end of the port E1 / 0/8 enters , from the side port E1 / 0/9 forwarding when made, the right is ______ ( one or more )

• A.portions partial misconfigured
• B.802.1p preferred precedence 2 packets at the end of the outlet E1 / 0/9 Forward all
• C.80Mbps packets are forwarded normally
• D.802.1p preferably precedence 1 packets at the end of the outlet E1 / 0/9 Forward all
• E.Packet traffic shaping is 65kbps for forwarding
• F.802.1p preferably precedence 1 packets and 802.1p preferred precedence 2 packets at the end of the outlet E1 / 0/9 has a loss, the ratio of traffic forwarding 5: 4

When the link type of the ONU port is Trunk , its processing method for upstream packets is _____ .

• A.only allowed without Tag packets to pass through, and the packets add the default VLAN of Tag
• B.Only allow the packets with the default LAN Tag to pass and go to the tag
• C.Only allow tagged messages to pass
• D.for without receipt of the Tag message, add the default VLAN Tag ; for received with Tag packets forwarded directly

In BGP MPLS VPN of networking, a private network user packet has two MPLS label, on which two layers of MPLS label statement is correct _______ .

• A.inner layer label tag is a public network, the LDP distribution protocol
• B.the outer label not be the same value
• C.the outer label may have the same value
• D.inner layer label is a private label, and the MP-BGP distribution protocol