Exam 7: Denial-Of-Service Attacks

The standard protocol used for call setup in VoIP is the ________ Protocol.

There is very little that can be done to prevent a flash crowd.

A characteristic of reflection attacks is the lack of _______ traffic.

To respond successfully to a DoS attack a good ______ plan is needed that includes details of how to contact technical personal for your ISP(s).

______ attacks are a variant of reflector attacks and also involve sending a packet with a spoofed source address for the target system to intermediaries.

_____ attacks flood the network link to the server with a torrent of malicious packets competing with valid traffic flowing to the server.

It is possible to specifically defend against the ______ by using a modified version of the TCP connection handling code.

Since filtering needs to be done as close to the source as possible by routers or gateways knowing the valid address ranges of incoming packets,an _______ is best placed to ensure that valid source addresses are used in all packets from its customers.

______ relates to the capacity of the network links connecting a server to the wider Internet.

Requests and _______ are the two different types of SIP messages.

In reflection attacks,the ______ address directs all the packets at the desired target and any responses to the intermediary.

SYN-ACK and ACK packets are transported using IP,which is an unreliable network protocol.

_______ is a text-based protocol with a syntax similar to that of HTTP.

If an organization is dependent on network services it should consider mirroring and ________ these servers over multiple sites with multiple network connections.

Flooding attacks take a variety of forms based on which network protocol is being used to implement the attack.

A denial-of-service attack is an attempt to compromise availability by hindering or blocking completely the provision of some service.

The ICMP echo response packets generated in response to a ping flood using randomly spoofed source addresses is known as _______ traffic.

The attacker needs access to a high-volume network connection for a SYN spoof attack.

A _______ flood refers to an attack that bombards Web servers with HTTP requests.

A ______ triggers a bug in the system's network handling software causing it to crash and the system can no longer communicate over the network until this software is reloaded.