2015
骞?/p>
9
鏈堝叏鍥借绠楁満绛夌骇鑰冭瘯涓夌骇
銆婄綉缁滄妧鏈�嬬湡棰樹竴
(
鎬诲垎
100,
鑰冭瘯鏃堕棿
90
鍒嗛挓
)
涓�銆佸崟閫夐
1.
涓嬪垪鎶�鏈腑锛屼笉灞炰簬瀹藉甫鍩庡煙缃?/p>
QoS
淇濊瘉鎶�鏈殑鏄?/p>
______
銆?/p>
A DiffServ
B MPLS
C EPON
D RSVP
璇ラ棶棰樺垎鍊?/p>
: 1
绛旀
:C
[
瑙ｆ瀽
]
瀹藉甫鍩庡煙缃?/p>
QoS
淇濊瘉鎶�鏈湁璧勬簮棰勭暀
(RSVP)
銆佸尯鍒嗘湇鍔?/p>
(DiffServ)
鍜屽鍗忚鏍囪浜や簰
(MPLS)
銆傛晠閫?/p>
C
閫夐」銆?/p>
2.
涓嬪垪鍏充簬鎺ュ叆鎶�鏈壒寰佺殑鎻忚堪涓紝姝ｇ‘鐨勬槸
______
銆?/p>
A ADSL
鎶�鏈叿鏈夐潪瀵圭О甯﹀鐗规�?/p>
B
杩滆窛绂绘棤绾垮甯︽帴鍏ョ綉閲囩敤
802.15.4
鏍囧噯
C
鍏夌氦浼犺緭绯荤粺鐨勪腑缁ц窛绂诲彲杈?/p>
1000km
浠ヤ笂
D Cable Modem
鍒╃敤
DWDM
鐨勬柟娉曞皢淇￠亾鍒嗕负涓婅淇￠亾鍜屼笅琛屼俊閬?/p>
璇ラ棶棰樺垎鍊?/p>
: 1
绛旀
:A
[
瑙ｆ瀽
]
ADSL(
闈炲绉版暟瀛楃敤鎴风嚎
)
鎶�鏈叿鏈夐潪瀵圭О甯﹀鐗规�э紝涓婅閫熺巼鍦?/p>
64kbib/s
锝?/p>
640kbib/s
锛屼笅
琛岄�熺巼鍦?/p>
500kbit/s
锝?/p>
7Mbit/s
銆傝繙璺濈鏃犵嚎瀹藉甫鎺ュ叆缃戦噰鐢?/p>
802.16
鏍囧噯銆傚厜绾や紶杈撶郴缁熺殑涓户璺濈
鍙揪
100km
浠ヤ笂銆?/p>
Cable
Modem
鍒╃敤棰戝垎澶嶇敤
(FDM)
鐨勬柟娉曞皢淇￠亾鍒嗕负涓婅淇￠亾鍜屼笅琛屼俊閬撱�傛晠閫?/p>
A
閫?/p>
椤广�?/p>
3.
涓嬪垪鍏充簬
RPR
鎶�鏈殑鎻忚堪涓紝姝ｇ‘鐨勬槸
______
銆?/p>
A RPR
鐜兘澶熷湪
30ms
鍐呭疄鐜拌嚜鎰?/p>
B RPR
鐜腑姣忎竴涓妭鐐归兘鎵ц
DPT
鍏钩绠楁硶
C RPR
鐜皢娌块『鏃堕拡鏂瑰悜浼犺緭鐨勫厜绾ょ幆鍙仛澶栫幆
D RPR
鐨勫唴鐜笌澶栫幆鍒嗗埆鐢ㄤ簬浼犺緭鏁版嵁鍒嗙粍涓庢帶鍒跺垎缁?/p>
璇ラ棶棰樺垎鍊?/p>
: 1
绛旀
:C
[
瑙ｆ瀽
] RPR
閲囩敤鑷剤鐜殑璁捐鎬濇兂锛岃兘澶熷湪
50ms
鐨勬椂闂村唴锛岄殧绂诲嚭鐜版晠闅滅殑缁撶偣鍜屽厜绾ゆ锛?/p>
RPR
鐜腑姣忎竴涓粨鐐归兘鎵ц
SRP
鍏钩绠楁硶锛屼袱涓?/p>
RPR
缁撶偣涔嬮棿鐨勮８鍏夌氦鏈�澶ч暱搴︿负
100
鍏噷锛?/p>
RPR
灏嗛『鏃?/p>
閽堜紶杈撶殑鍏夌氦鐜彨鍋氬鐜紝
RPR
灏嗛�嗘椂閽堜紶杈撶殑鍏夌氦鐜彨鍋氬唴鐜紝
RPR
鐨勫唴鐜笌澶栫幆閮藉彲浠ヤ紶杈撴暟鎹?/p>
鍒嗙粍涓庢帶鍒跺垎缁勩�傛晠閫夋嫨
C
閫夐」銆?/p>
4. ITU
鏍囧噯
OC-12
鐨勪紶杈撻�熺巼涓?/p>
______
銆?/p>
A 51.84Mbit/s
B 155.52Mbit/s
C 622.08Mbit/s
D 1.244Gbit/s
璇ラ棶棰樺垎鍊?/p>
: 1
绛旀
:C
[
瑙ｆ瀽
] Oc-n
锛?/p>
Optical Carrier level n(
鍏夎浇浣撶瓑绾?/p>
)
銆?/p>
OC
鏄?/p>
Optical Carrier
鐨勭缉鍐欙紝杩欐槸鍏夌氦
浼犺緭鐨勪竴绉嶅崟浣嶏紝
瀹冮�氬父琛ㄧず涓?/p>
OC-n
锛?/p>
鍏朵腑锛?/p>
n
鏄璺紶杈撴妧鏈腑鍩烘湰閫熺巼
51.84Mbit/s
鐨勫�嶆暟銆?/p>
OC-12
鍒欐槸
51.84Mbit/s
脳
12=622.08Mbit/s
銆傛晠閫?/p>
C
閫夐」銆?/p>