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信息安全工程師每日一練試題內(nèi)容(2021/8/4)
試題1: Snort是一款開源的網(wǎng)絡(luò)入侵檢測(cè)系統(tǒng),它能夠執(zhí)行實(shí)時(shí)流量分析和IP協(xié)議網(wǎng)絡(luò)的數(shù)據(jù)包記錄。以下不屬于Snort配置模式的是( )。 There are different ways to perform IP based DoS Attacks. The most common IP based DoS attack is that an attacker sends an extensive amount of connection establishment (1)(e.g. TCP SYN requests) to establish hanging connections with the controller or a DPS. Such a way, the attacker can consume the network resources which should be available for legitimate users. In other (2), the attacker inserts a large amount of (3)packets to the data plane by spoofing all or part of the header fields with random values. These incoming packets will trigger table-misses and send lots of packet-in flow request messages to the network controller to saturate the controller resources. In some cases, an (4)who gains access to DPS can artificially generate lots of random packet-in flow request messages to saturate the control channel and the controller resources. Moreover, the lack of diversity among DPSs fuels fuels the fast propagation of such attacks.
Legacy mobile backhaul devices are inherently protected against the propagation of attacks due to complex and vendor specific equipment. Moreover, legacy backhaul devices do not require frequent communication with core control devices in a manner similar to DPSs communicating with the centralized controller. These features minimize both the impact and propagation of DoS attacks. Moreover, the legacy backhaul devices are controlled as a joint effort of multiple network element. For instance, a single Long Term Evilution(LTE)eNodeB is connected up to 32 MMEs. Therefore, DoS/DDoS attack on a single core element will not terminate the entire operation of a backhaul device(5)the net work.
AES結(jié)構(gòu)由以下4個(gè)不同的模塊組成,其中()是非線性模塊
A、字節(jié)代換
B、行移位
C、列混淆
D、輪密鑰加
S/Key口令是一種一次性口令生產(chǎn)方案,它可以對(duì)抗()
A、惡意代碼木馬攻擊
B、拒絕服務(wù)攻擊
C、協(xié)議分析攻擊
D、重放攻擊
以下關(guān)于VPN的敘述中,正確的是()
A、VPN指的是用戶通過公用網(wǎng)絡(luò)建立的臨時(shí)的、安全的連接
B、VPN指的是用戶自己租用線路,和公共網(wǎng)絡(luò)物理上完全隔離的、安全的線路
C、VPN不能做到信息認(rèn)證和身份認(rèn)證
D、VPN只能提供身份認(rèn)證,不能提供數(shù)據(jù)加密的功能
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