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What is a characteristic of Network Time Protocol？（）

题目
单选题
What is a characteristic of Network Time Protocol？（）
A

NTP updates are sent in the timezone they are collected in，and the syslog server will adjust based  on the input time.

B

NTP authentication verifies the source，not the recipient.

C

NTP authentication requires that the recipient has multiple strata clocks to ensure accuracy.

D

Secure NTP can be configured to use SHA-1 hashing，since NTP is very insecure.

E

A stratum 0 clock should be configured at the core of every network，so it can connect to an accuratetime source.

参考答案和解析
正确答案： D
解析： 暂无解析
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相似问题和答案

第1题：

You have just configured a static default route on router TK1. What is the purpose of a default route?()

A. It is a route to be used when the routing protocol fails.

B. It is a route configured by an ISP that sends traffic into a corporate network.

C. It is a route used when a packet is destined for a remote network that is not listed in the routing table.

D. It is a route manually configured for a specific remote network for which a routing protocol is not configured.

E. It is used to send traffic to a stub network.


参考答案：C

第2题：

VOIP is being implemented on the Company network. In a properly designed network，  what is the  maximum amount of time a voice package should spend crossing a network？  （）

  • A、90 milliseconds
  • B、120 milliseconds
  • C、150 milliseconds
  • D、240 milliseconds

正确答案:C

第3题：

You need to decide on which trunking method to implement in the Ezonexam network. What is a characteristic of ISL and 802.1q frame. tagging in a switched LAN environment?

A．They are used to find the best path through a network.

B．They allow the exchange of filtering tables.

C．They specify different implementations of the Spanning-Tree Protocol.

D．They allow the exchange of routing tables

E．They provide inter-switch VLAN communication.


正确答案：E
解析：Explanation: A trunk link is the other type of Layer 2 port supported on Cisco switches. When a trunk port is configured, it begins marking frames as they exit the port to indicate which VLAN each frame. is associated with.

The trunk port can also read the markings, called tags, as they enter the trunk port. This enables the switch to send a frame. only to the ports for the given VLAN associated with the incoming frame. The main purpose of trunking is to carry traffic between switches and maintain the VLAN information.

Unlike an access link, the trunk link does not belong to a single VLAN but instead can carry traffic from several VLANs over a point-to-point link between two devices that understand the protocol. Two forms of trunking are used for Cisco switches on Ethernet networks: An IEEE industry standard called IEEE 802.1Q.

This is a frame-tagging mechanism that adds a VLAN identifier to the frame. by inserting a tag at Layer 2. Another form. of trunking on Cisco switches is called Inter-Switch Link (ISL), which is a Cisco proprietary trunking mechanism. ISL uses a frame. encapsulation method that adds a header to identify the VLAN.

Incorrect Answers:
A, D. These are the functions of routers, not switches.

B. Filtering tables can be used on certain Catalyst switches via the use of VLAN access control lists, but this information is never shared between switches.

C. A separate STP instance is created for each VLAN, but the STP implementation remains the same.

第4题：

What are the two reasons for the appearance of 0.0.0.0 as the next hop for a network when usingthe "show ip bgp" command？（）

  • A、The network was originated via redistribution of an interior gateway protocol into BGP
  • B、The network was defined by a static route
  • C、The network was learned via IBGP
  • D、The network was learned via EBGP
  • E、The network was originated via a network or aggregate command

正确答案:A,E

第5题：

What are the two reasons for the appearance of 0.0.0.0 as the next hop for a network in the show ip bgp command output？（）

  • A、The network was originated via redistribution of an interior gateway protocol into BGP
  • B、The network was defined by a static route
  • C、The network was originated via a network or aggregate command
  • D、The network was learned via EBGP
  • E、The network was learned via IBGP

正确答案:A,C

第6题：

The Testking network has been configured with OSPF as the routing protocol.What is the default administrative distance of the OSPF routing protocol?()

A.90

B.100

C.110

D.120

E.130

F.170

G.200


参考答案：C

第7题：

FCAPS is a network maintenance model defined by ISO. What does it stand for？（）

  • A、Action Management
  • B、Fault Management
  • C、Configuration Management
  • D、Protocol Management
  • E、Security Management

正确答案:B,C,E

第8题：

The Simple Network Management Protocol(SNMP)is an(66)protocol that facilitates the exchange of management information between(67). It is part of the Transmission Control Protocol/Internet Protocol(TCP/IP)protocol suite. SNMP enables network(68)to manage network performance, find and sole network problems, and plan for(69)An SNMP -managed network consists of three key components: managed devices ,(70),and network -management systems .

A．Physical Layer

B．Link Layer

C．Network Layer

D．Transport Layer


正确答案：D
解析：TransportLayer：传输层

第9题：

For what two purposes does the Ethernet protocol use physical addresses? （）

  • A、Network A - 172.16.3.48/26
  • B、Network A - 172.16.3.128/25
  • C、Network A - 172.16.3.192/26
  • D、Link A - 172.16.3.0/30
  • E、Link A - 172.16.3.40/30
  • F、Link A - 172.16.3.112/30

正确答案:A,E

第10题：

it is belong a family of ip routing protocols，each router have a partial map of network，what is the routing protocol？


正确答案: Class A： 10.0.0.0 --- 10.255.255.255
Class B： 172.16.0.0 --- 172.31.255.255
Class C:// 192.168.0.0 --- 192.168.255.255

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