首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
计算机
ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets? (Choose two) A. Th
ICMP is often used in troubleshooting and verifying network. What statements are true regarding ICMP packets? (Choose two) A. Th
admin
2009-05-19
58
问题
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.
选项
答案
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.
转载请注明原文地址:https://kaotiyun.com/show/50hZ777K
本试题收录于:
思科640802题库思科认证分类
0
思科640802
思科认证
相关试题推荐
[A]Enduringproblemssuchaswar,poverty,andviolenceultimatelyspringfromhumannature,whichnotechnologicalinnovation
Manyparentsadmitthatthereisthegenerationgapbetweenthemandtheirchildren.Howcanweeliminatethegap?Inthissecti
Asmanypeoplehitmiddleage,theyoftenstarttonoticethattheirmemoryandmentalclarityarenotwhattheyusedtobe.We
NextmonthBritonswillhaveyetmoresmartphonestochoosefrom,whendevicesfromWiko,atwo-year-oldFrenchcompany,goons
Afewyearsago,JamesGreenbegantodreadwork.HedraggedhimselfoutofbedeverymorningandploddedthroughNewYork’sPen
Itwassupposedtobethenew-mediaelection.E-mail,blogging,socialnetworkingandtweetingwereexpectedtosurgeinimporta
分帧文档被创建好之后,如果要使浏览器中看到的网页没有边框,在“FramesetPropertyInspector”中的“BorderWidth”文本框中的设置应该是______。A.设置为“0“B.设置为1C.清除该文本框中的数字D.与该栏的设置
使用ControlShockorFlash行为,不能控制的是______。A.启动Shockwave和Flash影片B.终止Shockwave和Flash影片C.倒卷Shockwave和Flash影片D.编辑Shockwave和Flash影片
随机试题
根据专利法律制度的规定,下列各项中,不授予专利权的有()。
(see)________fromthewindowoftheplane,thecitylookscleanerandmorebeautiful.
45岁女性,其左边第3肋间锁骨正中线处有一穿刺伤,血压80/70mmHg,心率100/min,SaO299%。左胸管已放置,并流出2000ml血液,请问接下来应如何处置
下列肿瘤中,属于恶性肿瘤的是
关于以划拨方式取得土地使用权的房地产转让时适用的《房地产管理法》特殊规定,下列哪些表述是正确的?(2009年卷一76题)
建设项目负责人的内部职责包括()。
()是指银监局根据法律、法规的规定,对银行机构进入市场、银行业务开展和银行从业人员素质实施管制的一种行为。
在编制现金预算时,计算某期现金余缺必须考虑的因素有()。
下列交易的会计处理中,不符合会计制度规定的是()。
Firecanhelppeopleinmanyways.Btuitcanalsobeveryharmful(有害的).Firecankeepyourhouse(41),givelightandcookfo
最新回复
(
0
)