[2023年2月] WCNA 免费样题练习一年更新 [Q38-Q52]

问题 38
When you apply a display filter, the Status Bar indicates the total number ofpackets captured and the packets displayed.

问题 39
You may need to capture traffic at different points on the network to identify the location of packet loss.

问题 40
Columns can be reordered by dragging them into their new positions directly in the Packet List pane.

问题 41
If a DHCP client does not receive an acknowledgment before the expiration of the rebinding time, the DHCP client must release its IP address and send a DHCP broadcast tolocate a DHCP server or Relay Agent.

问题 42
A TCP Acknowledgment Numberfield that is never incremented by a host after the TCP handshake indicates that no data is being received by that host.

问题 43
You have opened a trace file that has been sent to you and you noticed the timestamp only offers millisecond-level time values. You can enable Wireshark to add themicrosecond detail information to these packets.

问题 44
You are analyzing network traffic, but you only see ARP queries – you do not see any ARP responses. What could cause this situation?

问题 45
ICMP is used as a messaging system for errors, alerts,and general notifications on an IP network.

问题 46
The IPv4 Total Length field defines the length of the IP header, valid data and data link padding.

问题 47
You will only see the TCP Urgent Pointer field if the URG bit is set to 1 in a TCP packet.

问题 48
Both the capture and display filter syntax for ARP requests and replies is arp.

问题 49
During an ideal data transfer process, the TCP Time-Sequence graph plot points should run from the lower left corner to the upper rightcorner in a diagonal line of i-bars.

问题 50
DNS responses contain four sections: Question, Answer RR, Authority RR and Additional RR.

问题 51

Whichstatement about this HTTP packet is correct?

问题 52
Network analysis is oftenconsidered ‘electronic surveillance’ or ‘wiretapping* and may be illegal.