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網(wǎng)絡(luò)工程師每日一練試題內(nèi)容(2022/1/16)
試題1: 從技術(shù)發(fā)展角度看,最早出現(xiàn)的IP電話工作方式是(?。?br />A.PC-to-PC 802.11g工作在全球通用的 (1) ISM頻段,最高數(shù)據(jù)速率可達(dá) (2) 。
(1)A、1GHz
B、2.4GHz
C、5GHz
D、10GHz
(2)A、1Mbps
B、11Mbps
C、54Mbps
D、100Mbps
IPv6的鏈路本地地址是在地址前綴1111 1110 10之后附加(18)形成的。
A.IPv4地址
B.MAC地址
C.主機(jī)名
D.隨機(jī)產(chǎn)生的字符串
OSPF協(xié)議適用于4種網(wǎng)絡(luò)。下面選項(xiàng)中,屬于廣播多址網(wǎng)絡(luò)的是 (1) ,屬于非廣播多址網(wǎng)絡(luò)的是 (2) 。
(1)A、Ethernet
B、PPP
C、Frame Relay
D、RARP
(2)A、Ethernet
B、PPP
C、Frame Relay
D、RARP
設(shè)信道帶寬為4000Hz,調(diào)制為4種不同的碼元,根據(jù)Nyquist定理,理想信道的數(shù)據(jù)速率為 ( 8) 。
A、10 kb/s
B、16 kb/s
C、24 kb/s
D、48 kb/s
不使用面向連接傳輸服務(wù)的應(yīng)用層協(xié)議是 ( ) 。
A、SMTP
B、FTP
C、HTTP
D、SNMP
Without proper safeguards, every part of a network is vulnerable to a security breach or unauthorized activity from (1), competitors, or even employees. Many of the organizations that manage their own (2) network security and use the Internet for more than just sending/receiving e-mails experience a network (3)— and more than half of these companies do not even know they were attacked. Smaller (4) are often complacent, having gained a false sense of security. They usually react to the last virus or the most recent defacing of their website. But they are trapped in a situation where they do not have the necessary time and(5)to spend on security.
(1)A.intruders
B.terminals
C.hosts
D.users
(2)A.exterior
B.internal
C.centre
D.middle
(3)A.a(chǎn)ttack
B.collapse
C.breakdown
D.virus
(4)A.users
B.campuses
C.Companies
D.networks
(5)A.safeguards
B.businesses
C.experiences
D.Resources
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