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网络工程师每日一练试题内容(2024/5/8)
试题1
一台16口的全双工千兆交换机,至少需要()的背板带宽才能实现线速转发。查看答案
试题参考答案:C
试题2
IP地址块112.56.80.192/26包含了(1)个主机地址,不属于这个网络的地址是(2)。查看答案
试题参考答案:C、B
试题3
关于IGMP协议的描述中,正确的是:查看答案
试题参考答案:C
试题4
以下IP地址中,既能作为目标地址又能作为源地址,且以该地址为目的地址的报文在Internet上通过路由器进行转发的是( )。
A.0.0.0.0查看答案
试题参考答案:D
试题5
公钥体系中,私钥用于 (1) ,公钥用于 (2) 。
(1)A、解密和签名
B、加密和签名
C、解密和认证
D、加密和认证
(2)A、解密和签名
B、加密和签名
C、解密和认证
D、加密和认证
查看答案
试题参考答案:A、D
试题6
DHCP()报文的目的IP地址为255.255.255.255。查看答案
试题参考答案:A
试题7
IPv6地址分为3种类型,它们是( )。
A、A类地址、B类地址、 C类地址
B、单播地址、组播地址、任意播地址
C、单播地址、组播地址、广播地址
D、公共地址、站点地址、接口地址
查看答案
试题参考答案:B
试题8
The usual way to ensure reliable delivery is to provide the (1) with some feedback about what is happening at the other end of the line. Typically, the protocol calls for the receiver to send back special (2) frame bearing positive or negative (3) about the incoming frames. If the sender receives a positive acknowledgement about a frame, it knows the the frame has arrived safely. On the other hand, a negative acknowledgement means that something has gone wrong, and the frame must be transmitted again.
An additional complication comes from the possibility that hardware troubles may cause a frame to (4) completely. In this case, the receiver will not react at all, since it has no any reason to react. It should be clear that a protocol in which the sender transmits a frame and then waits for an acknowledgement, positive or negative, will hang forever if a frame is ever lost due to, for example, (5) hardware.。
(1)A、receiver
B、controller
C、sender
D、customer
(2)A、data
B、controll
C、request
D、session
(3)A、application
B、connection
C、stream
D、acknowledgement
(4)A、vanish
B、vary
C、appear
D、incline
(5)A、acting
B、working
C、malfunctioning
D、functioning
查看答案
试题参考答案:C、B、D、A、C
试题9
关于Internet域名服务系统的描述中,正确的是:查看答案
试题参考答案:B
试题10
Network firewalls are security devices used to stop or mitigate() access to private networks connected to the lnternet, especially intranets. The only traffic allowed on the network is defined via firewall ()-any other traffic attempting to access the network is blocked. Network firewalls sit at the () line of a network, acting as a communications liaison between internal and external devices, When properly configured, a firewall allows users to access any of the resources they need while simultaneously keeping out unwanted accesses. In addition to limiting access to a protected computer and network, a firewall can () all traffic coming into or leaving a network, and manage remote access to a private network through secure authentication certificates and logins. () firewalls examine every packet that passes through the network and then accept or deny it as defined by rules set by the user.
A.Ports
A.Front
A.Reply
A.Application-layer
查看答案
试题参考答案:A、B、A、A、B
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