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信息安全工程师每日一练试题内容(2021/8/4)
试题1: Snort是一款开源的网络入侵检测系统,它能够执行实时流量分析和IP协议网络的数据包记录。以下不属于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结构由以下4个不同的模块组成,其中()是非线性模块
A、字节代换
B、行移位
C、列混淆
D、轮密钥加
S/Key口令是一种一次性口令生产方案,它可以对抗()
A、恶意代码木马攻击
B、拒绝服务攻击
C、协议分析攻击
D、重放攻击
以下关于VPN的叙述中,正确的是()
A、VPN指的是用户通过公用网络建立的临时的、安全的连接
B、VPN指的是用户自己租用线路,和公共网络物理上完全隔离的、安全的线路
C、VPN不能做到信息认证和身份认证
D、VPN只能提供身份认证,不能提供数据加密的功能
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