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[其他] 300-115题库

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发表于 2018-2-5 13:05:19 | 显示全部楼层 |阅读模式
300-115的78题哪里有?论坛上的几个好心人提供的格式都下载不了,400多题背地我已经头昏脑涨了,打算用78去碰碰我那个运气% W- z: i6 `0 ]# z+ j7 P
发表于 2018-2-6 09:58:00 | 显示全部楼层
沙发 2018-2-6 09:58:00 回复 收起回复
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发表于 2018-2-8 01:51:42 | 显示全部楼层
Which two statements about 802.1Q are true? (Choose two.)
' m8 e- w. X0 D( m3 R3 z" ^A. It encapsulates the original Ethernet frame and adds a VLAN identifier.
1 M" Y% _+ Q" {B. It increases the maximum size an Ethernet frame to 1094 bytes., Z$ W) o: C( ]$ R: H
C. It adds a 32-bit field to the Ethernet frame between the source MAC address and length fields.
" w2 ]0 H& Y: w  T  D8 DD. It supports 8-byte VLAN identifiers.
# {& Q6 \8 A3 e) l# \; ?' u) oE. It is a Cisco proprietary protocol.8 z; u; i6 {! X! Z- H2 E
F. When It is enabled, it forces a recalculation of the frame check sequence field.
- z. {/ `3 ]5 ~Correct Answer: AF
$ p1 K+ N0 m8 K  T( H( X/ T+ u
这题答案对吗?我看到另外一个题库选CF
地板 2018-2-8 01:51:42 回复 收起回复
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发表于 2018-2-8 14:30:23 | 显示全部楼层
529054785 发表于 2018-2-8 01:51
4 U( ^0 g3 q# \, x  w; vWhich two statements about 802.1Q are true? (Choose two.)! w. }/ z3 D: x9 F9 \3 U
A. It encapsulates the original Ethernet  ...
3 c: r9 V9 a' v" ^
Not A  802.1Q is a trunking protocol, it did not encapsulates the frame, just adding 32 bits between Ethernet Frame and Sour Mac.9 ?3 M' I) y. J( u  f+ x' |
Not B it did not maximum the size
0 u  U: d5 x0 zC correct3 \4 `7 D# q6 Z3 d" Z$ Z
D It only add 32 bits info, can not support 8-vlan info1 ~/ |: ~& {: L1 D! S
E It is IEEE standard
, A9 u9 a( a4 C" S. ^% aF Correct after adding the info, we nee to run  crc again/ a- E0 @' v) D
  
5# 2018-2-8 14:30:23 回复 收起回复
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