QUESTION 43 Switch is a network level device. True False     QUESTION 44 If you behind a NAT router, it would change the destination port for all outgoing packets. True False     QUESTION 45 Authentication means that only sender, intended receiver should “understand” message contents     True False     QUESTION 46 Header checksum (in the IPv4 header) needs to be computed at each router, why this is needed?

Q: The size of the TCP header source port is ______________ bits.     8     64     32     16…

A: 1. TCP wraps each data packet with a header which contains 10 mandatory fields totaling 20 bytes (or…

Q: What does a cybersecurity analyst know about their target if they receive a RST packet back from a…

A: 1. The target is active but the port is closed if you get an RST (reset) packet back from it. If no…

Q: Explain in detail step by step specifying protocols what happens when a PC at 137.168.35.6 tries to…

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Q: Select the security policy that corresponds to the following set of filtering rules: Direction…

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Q: In tunnel mode, the whole IP packet is protected even if the source is host. True False

A: The question wants to know if in tunnel mode, the whole IP packet is protected or not if the source…

Q: ents of the TCP/IP three-way handshake. Pick one component and discuss possible attack methods…

A: given -  There are three components of the TCP/IP three-way handshake. Pick one component and…

Q: Are these two addresses are on the same network? 174.153.99.131, SM: 255.255.255.128 174.153.99.8,…

A: 1.174.153.99.131, SM: 255.255.255.128 Ip address 174.153.99.131  10101110.10011001.01100011.10000011…

Q: The figure below shows a network with a NAT router. In step 1, host 10.0.0.1 sends a datagram from…

A: The correct answer of the questions is option ("b") "138.76.29.7.5001"

Q: When you run a scan on your computer, you see a session with a host at the IP address What protocol…

A: Given IP address is  208.85.40.44:443  Port 80 indicates this is an HTTP session.   Port 80/HTTP is…

Q: 2) Authentication applied to all of the packet except for the IP header is, A) ESP tunnel mode B)…

A: ESP tunnel mode Option(A) is the correct answer.

Q: Some signalling errors can cause entire ranges of bits in a packet to be overwritten by all Os or…

A: In packet-switched layer networks, we use a connectionless protocol known as IPv4. These are written…

Q: For each of the following IPv4 addresses for 59.51.235.72 1 – CIDR notation 2 – Subnet mask 3 –…

A: IP Address: 59.51.235.72 Network Address: 59.51.235.72 Usable Host IP Range: 59.51.235.73 -…

Q: 450005dc 1e244000 8006... is a piece of information in an IP datagram header (in hexadecimal)

A: The header size is 20 bytes.

Q: Since a gateway (NAT) router only has one public IP address, but may forward packets from many…

A: We are going to understand how NAT works and how NAT could remember these many IP addresses to…

Q: What are the IPSec header fields that allow an IPSEC gateway to determine which encryption technique…

A: Introduction: IPsec protects communications over Internet Protocol (IP) networks by utilising…

Q: In an IPv4 packet, the value of HLEN is (1010)2 and the value of the full-length field is (005A)16.…

A: Bytes of data are transported by this packet

Q: IPSec's Authentication Header in transport mode is used to secure an IP packet, whose payload is a…

A: Answer for the above question is option "(A).Time to Live" Explanation: A well-known IP process is…

Q: A TCP segment consisting of 1500bits of data and 160bits of header is sent to the IP layer, which…

A: The answer is..

Q: A Layer 3 IPv4 packet does not contain which of the following?   Protocol No. 1   MAC Address of…

A: The OSI Paradigm is a networking model with seven layers. The Network Layer is the third layer in…

Q: If you look at its packet header, you can tell that Version, length and message authentication code…

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Q: Assume that the user having the IP address 11.22.33.44 is communicatingo the web server with IP…

A: Task :- Choose the correct option for given question.

Q: A network administrator configures the interface Gi7 on R1 with the command ip address 178.18.28.234…

A:

Q: In case of Network Address Translation (NAT), the host at private IP address 192.168.100.3 is…

A: This is network related question.

Q: Assuming there is no other application are running on the system, what will happen to this packet?…

A: If packet arrives with port 80, and since given in question no application running to receive this…

Q: An IPV4 datagram has arrived with the following information in the first bytes of the header (in…

A: Let’s see some points on IPv4 datagram:IPv4 is a connectionless protocol.It is packet-switching…

Q: Q1) Refer to the exhibit. NAT is configured on Remote and Main. The PC is sending a request to the…

A: the packet is send from main to remote web server .therefor it will use a global IP address.and the…

Q: In IPSec, authentication and encryption applied to the entire original IP packet is _________ . A)…

A: In IPSec, authentication and encryption applied to the entire original IP packet is tunnel mode…

Q: Question 2 A network administrator configures the interface Gi7 on R1 with the command ip address…

A: Q2 what is the possible cause of problem

Q: A router has just received the following new IP addresses: 57.6.96.0/21, 57.6.104.0/21,…

A: ANS: - IP addresses in binary form: - 57.6.96.0/21:  00111001 00000110 01100000 00000000…

Q: What are the advantages of placing cryptographic algorithms at the network layer?   1. Applying…

A: Advantages: Protect the IP address: When the cryptographic algorithms are applied to the source or…

Q: The first of these packets is from your computer to the DHCP server telling it to release the lease…

A: This is because the address of the MAC is how machines interact on a subnet. As computer A sends…

Q: In tunnel mode, IPsec encapsulates and protects the entire IP packet, appends its own protocol…

A: Answer: In tunnel mode, the first bundle is embodied in another IP header. The addresses in the…

Q: The router received a packet with a source IP address 192.168.10.1 and a destination IP address…

A: Given data:- The router received a packet with a source IP address 192.168.10.1 and a destination IP…

Q: You have been provided with the following ip addresses 172.16.1.0/24, 172.16.2.0/24 and…

A: So first we will start with some basic information about IP address, Subsequent Subnet mask and…

Q: For each of the following IPv4 addresses for 192.168.0.17 1 – CIDR notation 2 – Subnet mask 3 –…

A: a) CIDR 192 is in class C (192 to 223) therefore 192.168.0.17/24   b) Subnet mask 255.255.255.0   c)…

Q: 191.254.0.32 is a valid IP host address given the network ID of 191.254.0.0 while using 11 bits for…

A: IP address: An IP address is a unique address that identifies a device on the network.  And these…

Q: Assume that the flags in a TCP packet are set in the order of [ cwr | ece | urg | ack | psh | rst |…

A: a Scapy command to perform "FIN" scan two ports 4000 and 4050 of the destination with IP address,…

Q: 4. Your computer has the following IPV4 address at dotted decimal form: 10.A. A. A / B where A is…

A: Consider my birth date is  12th may A=12+200   =212 B=10+5  =15 The address can be written as…

Q: In IPsec, each incoming and outgoing packet will be checked with the Security Policy Database (SPD)…

A:

Q: Q5: If Host A in the following network used MTU discovery protocol to send packets to Host B, what…

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Q: DNS employs UDP over TCP. No automatic recovery if a DNS packet is missed. Is this a problem, and if…

A: DNS uses UDP rather than TCP because UDP is faster. Due to three-way handshake, TCP is slower. DNS…

Q: 1. The router discards packets with a TTL value of 0. O True O False 2 Which of the following is a…

A: 1) True. After TTL value=0 , It will send ICMP message to the host.

Q: Question 19 TTL (Time to Live) field in the IPV4 datagram represents: A The maximum life duration of…

A:

Q: OSPF messages and ICMP messages are directly encapsulated in an IP datagram. If we intercept an IP…

A: Please give positive ratings for my efforts. Thanks.   ANSWER   Yes, OSPF messages and ICMP…

Q: Your boss hands you an IPV6 network assignment allocated by your ISP. He asks you to allocate the…

A: 1 2001:0db8:1234:: 2001:db8:1234:: - 2001:db8:1234:: 2001:db8:1234::/64…

Q: For the given IP address 193.105.1.60/27, find the network address, First Address, Last address for…

A: As given in the question, the IP address (numeric tag given to each device in a computer network)…

Q: administrator has configured the gateway routers at the four campuses to use IPsec to encrypt all…

A:

Q: Given an IP address: 164.12.140.13 With a subnet mask: 255.255.255.0 What is the network (subnet)…

A: Dynamic Routing is the Mechanized and automated adjustments and adaption of the routes according to…