Extended IP Access Control Lists (ACLs) are utilized to filter IP traffic in a network, and they are more advanced than standard IP ACLs.
Extended IP ACLs enable network administrators to filter IP traffic based on criteria such as protocol, IP address, source/destination port numbers, and other characteristics. Here are some of the facts about extended IP ACLs that are true:They offer better network security by allowing network administrators to more precisely control traffic.They can be used to allow or deny specific types of traffic based on the specific needs of the network.
They are generally utilized at the edge of a network to control traffic flowing in or out of the network. Extended IP ACLs provide more granular filtering options, such as filtering based on the type of protocol used, source and destination IP addresses, source and destination ports, and other criteria.
They operate on a first-match basis, which means that once a match is made, further rules are ignored.Extended IP ACLs are more complicated to configure than standard IP ACLs, but they provide better security and flexibility when managing network traffic.
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Create a class of name arithematic logic operator. Over load the operator
An example of an ArithmeticLogicOperator class that overloads the +, -, *, and / operators is
class ArithmeticLogicOperator:
def __init__(self, value):
self.value = value
def __add__(self, other):
return self.value + other.value
def __sub__(self, other):
return self.value - other.value
def __mul__(self, other):
return self.value * other.value
def __truediv__(self, other):
return self.value / other.value
How does this work?You can create instances of the ArithmeticLogicOperator class and perform arithmetic operations using the overloaded operators.
he ArithmeticLogicOperator class takes a value as input during initialization.
The overloaded operators allow you to perform arithmetic operations between instances of the class, returning the desired result.
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an attack that forges the sender’s ip address is called:
IP spoofing is an attack where the attacker manipulates the sender's IP address to deceive or disguise their identity. It can be used for malicious purposes like DoS attacks or MitM attacks.
IP spoofing is a technique used in network communication where an attacker manipulates the IP address in the header of an IP packet to falsely represent the sender's identity. By forging the source IP address, the attacker disguises their true origin and makes it appear as if the packet is originating from a different source.
IP spoofing can be employed for various malicious purposes, including:
Denial-of-Service (DoS) attacks: Attackers can send a flood of IP packets with spoofed source addresses to overwhelm a target system or network, making it difficult to trace the source and effectively defend against the attack.
Man-in-the-middle (MitM) attacks: By spoofing IP addresses, attackers can intercept network traffic between two communicating parties, positioning themselves as intermediaries and potentially eavesdropping on or altering the data being transmitted.
Evading identification: Spoofing the IP address can be used to mask the true source of an attack, making it challenging for network administrators or security systems to trace the origin accurately.
Countermeasures against IP spoofing include implementing network-level protections such as ingress/egress filtering, where routers and firewalls are configured to verify the legitimacy of IP addresses.
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Assume a processor scheduler which needs to handle the following incoming processes:
P1, arrival at t=0, burst time = 4
P2, arrival at t=1, burst time = 3
P3, arrival at t=2, burst time = 1
Trace the following processor scheduling algorithms:
a) First come first serve
b) Shortest task first (non-preemptive)
c) Shortest task first (preemptive)
d) Round robin with quantum = 1
a) First come first serve (FCFS):
The order of process execution is P1, P2, P3.
b) Shortest task first (non-preemptive):
The order of process execution is P3, P2, P1.
c) Shortest task first (preemptive):
The order of process execution is P3, P2, P1.
d) Round robin with quantum = 1:
The order of process execution is P1, P2, P3.
In the first-come-first-serve (FCFS) scheduling algorithm, the processes are executed in the order they arrive. In this case, P1 arrives first, followed by P2 and P3. Therefore, P1 is executed first, then P2, and finally P3.In the shortest task first (non-preemptive) scheduling algorithm, the process with the shortest burst time is executed first, without preemption. Here, P3 has the shortest burst time, so it is executed first, followed by P2 and P1.In the shortest task first (preemptive) scheduling algorithm, the process with the shortest burst time is executed first, but it can be preempted by a process with an even shorter burst time. Again, P3 has the shortest burst time and is executed first. However, since P2 arrives before P1, it preempts the execution of P3. Once P2 is completed, P3 resumes execution, and finally, P1 is executed.In the round-robin scheduling algorithm with a quantum of 1, each process is given a time slice (quantum) of 1 unit, and they take turns executing. P1 is executed first, followed by P2 and P3. The process execution continues in a circular manner, with each process receiving one unit of execution time until all processes are completed.Learn more about First come first serve
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Storing a string byte using string primitives increments/decrements which register? a)EDI b)EDX c)ESI d)ES
When storing a string byte using string primitives, the "EDI" register is typically incremented or decremented to track the memory location. Thus, the answer is option a) EDI.
When storing a string byte using string primitives, the register that is typically incremented or decremented is the "EDI" register (option a).
The EDI (Extended Destination Index) register is one of the general-purpose registers in the x86 architecture. It is commonly used as an index register in string operations, such as moving or copying strings in memory. When storing a string byte, the EDI register is often incremented or decremented to keep track of the memory location where the next byte should be stored.
Therefore, option a) EDI is the correct answer.
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