Transmitting numerous SYN packets to a targeted receiver, but NOT responding to an ACK, isa. a DES message.b. the request-response technique.c. a denial of service attack.d. a call-back device.
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Transmitting numerous SYN packets to a targeted receiver, but NOT responding to an ACK, is
a. a DES message.
b. the request-response technique.
c. a denial of service attack.
d. a call-back device.
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- how many blocks will be generated out of 320 bit plaintext message when encrypted using DES ? What is size of final cipher text ? a) 5 and 256 b) 4 and 320 c) 5 and 320 d) 4 and 256When Zigbee provides privacy and message integrity, which fields of data are encrypted? Which fields of this data have been verified? Either before or after the message is encoded, the integrity code is created.What is the primary difference between a packet-filtering router and a stateful inspection router? firewall?
- You have been called to conduct a forensics investigation of network activity within an organizational. The leadership of the organization is concerned that insecure protocols are being used on the network and would like proof of this activity. Using the packet capture file named Final.pcap conduct an analysis of the session and answer the following questions: What unencrypted file transfer protocols were used during the session? Where any login credentials sent during the session? Were any files transferred during the session?A Smurf attack could be described using which of the following statements? Very large email attachments are sent to the victim’s email address Continually polling all possible Transmission Control Protocol and User Datagram Protocol ports to prevent legitimate connections Sending numerous SYN packets to a server and not replying to the resultant SYN/ACK packets An ICMP Type 8 (ECHO) packet with a spoofed source address is sent to the broadcast address of a large network; each member of that large network responds with an echo response packet to the spoofed source address, which floods the victimWhat is a replay attack? Describe the role of the sequence number field in a replay attack? Describe the Transport Layer Security (TLS) service in detail. Why is there a separate Change Cipher Spec Protocol, rather than including a change_cipher_spec message as part of the Handshake Protocol? What is the difference between a TLS connection and TLS session?
- The following gives some facts about Evasion attack (refer to the following figure which shows the attacking scenario for the facts). Please select the correct order to make this attack work. a. Packet "R" is buffered; b. Packet "EWT" is sent and accepted by NIDS; c. Finish three-way handshake to establish a TCP connection to the destination; d. Packet SYN carrying data "R" is sent; e. Packet "EWT" is accepted by the destination; f. Packet "R" and "EWT" are assembled at the destination . Question 11 options: dabcef dacbef dbacef dcabefEach question is a judgment question. Write down your answer with T for True, F for False, and give the explanation if the answer is False. Consider a system of bandwidth 10Mbps, with multiple users, each is active (i.e., have data to transmit at rate 1Mbps) with a low probability, e.g. 0.1. From the capacity perspective, packet switching is better than circuit switching because the former can support more users. Denial of Service (DoS) attack can be generated by a large number of (legitimate) TCP connection requests to the same targeted server at the same time. These TCP requests can be originated from different hosts in a botnet, which is controlled by the attacker. In VSAT systems the micro-stations do not have sufficient power to communicate directly with one another; hence, they use a ground station called a hub with a high gain antenna to relay traffic. In the current Internet, communication across the Atlantic Ocean between the USA and Europe is mostly done by wireless…Which fields in the IP datagram always change from one datagram to the next within this series ofICMP messages sent by your computer? Which fields stay constant? Which of the fields must stayconstant? Which fields must change? Why?