Which command can verify Application Layer connectivity between 2 hosts? : h# \& y- |: M
A. arp
, N: }# E: o# a# V& C9 yB. ping * j6 Z4 c/ s, x5 L: z* K0 h
C. telnet
( \' H+ U! C1 g1 h* M: x. d5 hD traceroute ! l& j D- H3 V) i' V0 E
E. plp 4 i2 C9 |" i. W! f; d) {
题目意思：以下命令当中那个是在应用层验证两个主机的联通性的命令？
5 ^- r' y2 {8 q, ^! u! s# V. rTelnet tests the Application layer， ping test the Network layer.Telnet is an application used to remotely configure a device. If telnet is succesffulyou know that full 7 layer stack on the sending and receiving host are configured correctlyand are in workingorder - F, n6 X/ J+ r6 {' Y
因为telnet命令是工作在应用层，ping命令是工作在网络层的，telnet是应用于远程控制设备的，所以如果能telnet成功的话，这就证明了两台主机或设备已经联通了，在联通性上面已经没有问题了。
3 I( ^) \& a- | n, j1 |该题目主要考学员命令工作的层面，和OSI七层的关系。 8 K0 w6 z3 v7 y; e" j$ f( s+ c* J* u
正确答案：C |
发表于 2012-8-3 19:18:10
