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[判断题]

When packet loss occurs to ZXCTN series equipment, source end is required to retransm

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更多“When packet loss occurs to ZXC…”相关的问题

第1题

Which of the parameter can be used to define the typical QoS？（)

A.Bandwidth

B.Delay

C.Delay jitter

D.Packet loss ratio

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第2题

在PTN设备上规定的性能OAM包括如下()

A、LM(Frame. Loss Measurement)：用于测量从一个MEP 到另一个MEP的单向或双向帧丢失率

B、DM(Packet Delay and Packet Delay Variation Measurements (DM))：用于测量从一个MEP到另一个MEP的分组传送时延和时延变化

C、EXperimental (EX) 功能：在一个管理域内，出于实验的目的发送的帧

D、CSF：用于从T-MPLS路径的源端传递客户层的失效信号到T-MPLS路径的宿端

E、LB(Loopback)- 环回链路检测

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第3题

An internet is a combination of networks connected by（71) .When a datagram goes from a sou

An internet is a combination of networks connected by (71) .When a datagram goes from a source to a (72) ，it will probably pass many (73) until it reaches the router attached to the destination network．A router receives a (74) from a network and passes it to another network．A router is usually attached to several networks．When it receives a packet，to which network should it pass the packet？ The decision is based on optimization： Which of the available (75) is the optimum pathway？

A．modems

B．routers

C．switches

D．computers

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第4题

阅读下面的短文，回答问题 [When an IP packet arrives at a router, generally the router loo

ks at the destination address of the packet, and forwards the packet to one of its network interfaces. The forwarding decision is usually done by looking up the destination address from another data structure called a forwarding table. The forwarding table is created by the router using the routing table and possible routing policies existing in the router. The router then creates a table where it lists which networks are accessible through which of the router’s network interfaces. An IP router looks at every IP packet individually and does the forwarding decision on a packet-by-packet basis. If something changes in the router’s routing table, a packet can take a different route from a preceding packet even if it has the same destination.] From the paragraph above，we can see that the router （） a forwarding table according to the routing table and possible routing policies existing in the router. When an IP packet arrives at a router, the （） part of packet is normally checked by the router. An IP router checks every IP Packet individually and makes the forwarding decision based on （）.

A．is generating B．generate C．is generated D．generates A．forwarding table B．network interfaces C．routing policies D．destination address A．the destination address and network interfaces B．forwarding table and network interfaces C．the destination address and forward table D．routing policies and routing table

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第5题

For （71) service, we need a virtual-circuit subnet. Let us see how that works. The idea be

For (71) service, we need a virtual-circuit subnet. Let us see how that works. The idea behind virtual circuits is to avoid having to choose a new (72) for every packet sent. Instead, when a connection is established, a route from the (73)machine to the destination machine is chosen as part of the connection setup and stored in tables inside the (74) That route is used for all traffic flowing over the connection, exactly the same way that the telephone system works. When the connection is released, the virtual circuit is also terminated. With connection-oriented service, each packet carries an (75) telling which virtual circuit it belongs to.

A．connectionless

B．connection-oriented

C．datagram

D．telegram

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第6题

Routing．protocols use different techniques for assigning【S1】to individual networks．Further

，each routing protocol forms a metric aggregation in a different．way．Most routing protocolscan use muh．iple paths if the paths have an equal【S2】．Some routing protocols can evenuse multiple paths when paths have an unequal cost．In either ease，load【S3】can improveoverall allocation of network bandwidth．When mulliple paths are used.there are several ways to distribute the packets．The two most common mechanisms are per—packet load balancing and per—destination load balancing．Per—packet load balancing distributes the【S4】across the possi-ble routes in a manner proportional to the route metrics．Per-destination load balancing distributes packets across the possible routes based on【S5】．

【S1】

A．calls

B．metrics

C．1inks

D．destinations

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第7题

Under the CIF term, the risk of loss of or damage to the goods is transferred from the sel

ler to the buyer when the goods pass the ship’s rail in the port of destination.()

A．正确

B．错误

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