JN0-100
多选题Which two statements regarding traceroute on JUNOS devices are correct?（）ATraceroute transmits ICMP echo-request packets.BTraceroute transmits UDP packets.CTraceroute receives ICMP echo-reply packets.DTraceroute receives ICMP port-unreachable packets.
题目
Traceroute transmits ICMP echo-request packets.
Traceroute transmits UDP packets.
Traceroute receives ICMP echo-reply packets.
Traceroute receives ICMP port-unreachable packets.
相似问题和答案
第1题：
A.Traceroute transmits ICMP echo-request packets.
B.Traceroute transmits UDP packets.
C.Traceroute receives ICMP echo-reply packets.
D.Traceroute receives ICMP port-unreachable packets.
第2题：
The ______ transmits own ship data cyclically via two defined VHF channels and receives the same data of the other ships and objects that are equipped with AIS systems．
A.AIS
B.ECDIS
C.GPS
D.VDR
第3题：
TCP/IP协议组的网际网层(网络层)含有四个重要的协议，它们是( )。
A. IP, ICMP, ARP, UDP
B. TCP, ICMP , UDP , ARP
C. IP, ICMP，ARP , RARP
D. UDP, IP, ICMP. RARP
第4题：
TCP/IP协议组的网际网层（网络层）含有四个要的协，它们是（）。
- A、IP，ICMP，ARP，UDP
- B、TCP，ICMP，UDP，ARP
- C、IP，ICMP，ARP，RARP
- D、UDP，IP，ICMP，RARP247
正确答案:C
第5题：
Traceroute程序用来显示报文到目的地经过的网关地址，Traceroute依靠ICMP的（）信息来获取网关地址？
- A、ICMP目的地址不可达
- B、ICMP超时
- C、ICMP端口不可达
- D、ICMP网络不可达
正确答案:C
第6题：
Internet的网络层含有四个重要的协议，分别为( )
A．IP，ICMP，ARP，UDP
B．TCP，ICMP，UDP，ARP
C．IP，ICMP，ARP，RARP
D．UDP，IP，ICMP，RABP
第7题：
ping命令和traceroute命令基于相同的ICMP功能。
正确答案:正确
第8题：
ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets? (Choose two)
A. They acknowledge receipt of TCP segments.
B. They guarantee datagram delivery.
C. They can provide hosts with information about network problems.
D. They are encapsulated within IP datagrams.
E. They are encapsulated within UDP datagrams.
F. They are encapsulated within TCP datagrams.
C,D 解析：Explanation:
ping may be used to find out whether the local machines are connected to the network or whether a remote site is reachable. This tool is a common network tool for determining the network connectivity which uses ICMP protocol instead of TCP/IP and UDP/IP. This protocol is usually associated with the network management tools which provide network information to network administrators, such as ping and traceroute (the later also uses the UDP/IP protocol).
ICMP is quite different from the TCP/IP and UDP/IP protocols. No source and destination ports are included in its packets. Therefore, usual packet-filtering rules for TCP/IP and UDP/IP are not applicable. Fortunately, a special "signature" known as the packet's Message type is included for denoting the purposes of the ICMP packet. Most commonly used message types are namely, 0, 3, 4, 5, 8, 11, and 12 which represent echo reply, destination unreachable, source quench, redirect, echo request, time exceeded, and parameter problem respectively.
Incorrect Answers
ICMP is an IP protocol so A and E are incorrect.
ICMP doesn't guarantee datagram delivery so B is wrong as well.
第9题：
TCP/IP协议组的网际网层（网络层）含有四个重要的协议，它们是（）。
- A、IP，ICMP，ARP，UDP
- B、TCP，ICMP，UDP，ARP
- C、IP，ICMP，ARP，RARP
- D、UDP，IP，ICMP，RARP
正确答案:C
第10题：
Internet网络层使用的四个重要协议是（）
- A、IP、ICMP、ARP、UDP
- B、IP、ICMP、ARP、RARP
- C、TCP、UDP、ARP、RARP
- D、UDP、ARP、RARP
正确答案:B