Computer Science Engineering (CSE) Exam  >  Computer Science Engineering (CSE) Questions  >  A layer-4 firewall (a device that can look at... Start Learning for Free
A layer-4 firewall (a device that can look at all protocol headers up to the transport layer) CANNOT
  • a)
    block entire HTTP traffic during 9:00PM and 5:00AM
  • b)
    block all ICMP traffic
  • c)
    stop incoming traffic from a specific IP address but allow outgoing traffic to the same IP address
  • d)
    block TCP traffic from a specific user on a multi-user system during 9:00PM and 5:00AM
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
A layer-4 firewall (a device that can look at all protocol headers up ...
Since it is a layer 4 firewall it cannot block application layer protocol like HTTP.
View all questions of this test
Most Upvoted Answer
A layer-4 firewall (a device that can look at all protocol headers up ...
Layer-4 Firewall Restrictions

A layer-4 firewall can examine all protocol headers up to the transport layer, including TCP and UDP packets. However, there are certain limitations to what a layer-4 firewall can do.

Cannot Block Entire HTTP Traffic During 9:00PM and 5:00AM

A layer-4 firewall cannot block entire HTTP traffic during a specific time range, such as 9:00PM to 5:00AM. This is because HTTP traffic is carried over TCP, and a layer-4 firewall cannot distinguish between different types of HTTP traffic. Therefore, it cannot block HTTP traffic based on time of day.

Cannot Block All ICMP Traffic

A layer-4 firewall can block ICMP traffic, but it cannot block all ICMP traffic. ICMP is used for network troubleshooting and error reporting, and blocking all ICMP traffic can cause network problems. Therefore, a layer-4 firewall should only block specific types of ICMP traffic that are known to be malicious.

Cannot Stop Incoming Traffic from a Specific IP Address but Allow Outgoing Traffic to the Same IP Address

A layer-4 firewall cannot stop incoming traffic from a specific IP address but allow outgoing traffic to the same IP address. This is because the firewall cannot distinguish between incoming and outgoing traffic based on IP address alone. Therefore, a layer-4 firewall can only block traffic based on the type of protocol and port number.

Cannot Block TCP Traffic from a Specific User on a Multi-User System During 9:00PM and 5:00AM

A layer-4 firewall cannot block TCP traffic from a specific user on a multi-user system during a specific time range, such as 9:00PM to 5:00AM. This is because a layer-4 firewall cannot distinguish between different users on a multi-user system based on TCP traffic alone. Therefore, a layer-4 firewall can only block traffic based on the type of protocol and port number.

Conclusion

In conclusion, a layer-4 firewall has certain limitations, and it cannot perform all the functions that are required for network security. Therefore, it is important to use multiple layers of security, including firewalls, intrusion detection systems, and other security measures to ensure the security of the network.
Explore Courses for Computer Science Engineering (CSE) exam

Top Courses for Computer Science Engineering (CSE)

A layer-4 firewall (a device that can look at all protocol headers up to the transport layer) CANNOTa)block entire HTTP traffic during 9:00PM and 5:00AMb)block all ICMP trafficc)stop incoming traffic from a specific IP address but allow outgoing traffic to the same IP addressd)block TCP traffic from a specific user on a multi-user system during 9:00PM and 5:00AMCorrect answer is option 'A'. Can you explain this answer?
Question Description
A layer-4 firewall (a device that can look at all protocol headers up to the transport layer) CANNOTa)block entire HTTP traffic during 9:00PM and 5:00AMb)block all ICMP trafficc)stop incoming traffic from a specific IP address but allow outgoing traffic to the same IP addressd)block TCP traffic from a specific user on a multi-user system during 9:00PM and 5:00AMCorrect answer is option 'A'. Can you explain this answer? for Computer Science Engineering (CSE) 2024 is part of Computer Science Engineering (CSE) preparation. The Question and answers have been prepared according to the Computer Science Engineering (CSE) exam syllabus. Information about A layer-4 firewall (a device that can look at all protocol headers up to the transport layer) CANNOTa)block entire HTTP traffic during 9:00PM and 5:00AMb)block all ICMP trafficc)stop incoming traffic from a specific IP address but allow outgoing traffic to the same IP addressd)block TCP traffic from a specific user on a multi-user system during 9:00PM and 5:00AMCorrect answer is option 'A'. Can you explain this answer? covers all topics & solutions for Computer Science Engineering (CSE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A layer-4 firewall (a device that can look at all protocol headers up to the transport layer) CANNOTa)block entire HTTP traffic during 9:00PM and 5:00AMb)block all ICMP trafficc)stop incoming traffic from a specific IP address but allow outgoing traffic to the same IP addressd)block TCP traffic from a specific user on a multi-user system during 9:00PM and 5:00AMCorrect answer is option 'A'. Can you explain this answer?.
Solutions for A layer-4 firewall (a device that can look at all protocol headers up to the transport layer) CANNOTa)block entire HTTP traffic during 9:00PM and 5:00AMb)block all ICMP trafficc)stop incoming traffic from a specific IP address but allow outgoing traffic to the same IP addressd)block TCP traffic from a specific user on a multi-user system during 9:00PM and 5:00AMCorrect answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Computer Science Engineering (CSE). Download more important topics, notes, lectures and mock test series for Computer Science Engineering (CSE) Exam by signing up for free.
Here you can find the meaning of A layer-4 firewall (a device that can look at all protocol headers up to the transport layer) CANNOTa)block entire HTTP traffic during 9:00PM and 5:00AMb)block all ICMP trafficc)stop incoming traffic from a specific IP address but allow outgoing traffic to the same IP addressd)block TCP traffic from a specific user on a multi-user system during 9:00PM and 5:00AMCorrect answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of A layer-4 firewall (a device that can look at all protocol headers up to the transport layer) CANNOTa)block entire HTTP traffic during 9:00PM and 5:00AMb)block all ICMP trafficc)stop incoming traffic from a specific IP address but allow outgoing traffic to the same IP addressd)block TCP traffic from a specific user on a multi-user system during 9:00PM and 5:00AMCorrect answer is option 'A'. Can you explain this answer?, a detailed solution for A layer-4 firewall (a device that can look at all protocol headers up to the transport layer) CANNOTa)block entire HTTP traffic during 9:00PM and 5:00AMb)block all ICMP trafficc)stop incoming traffic from a specific IP address but allow outgoing traffic to the same IP addressd)block TCP traffic from a specific user on a multi-user system during 9:00PM and 5:00AMCorrect answer is option 'A'. Can you explain this answer? has been provided alongside types of A layer-4 firewall (a device that can look at all protocol headers up to the transport layer) CANNOTa)block entire HTTP traffic during 9:00PM and 5:00AMb)block all ICMP trafficc)stop incoming traffic from a specific IP address but allow outgoing traffic to the same IP addressd)block TCP traffic from a specific user on a multi-user system during 9:00PM and 5:00AMCorrect answer is option 'A'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice A layer-4 firewall (a device that can look at all protocol headers up to the transport layer) CANNOTa)block entire HTTP traffic during 9:00PM and 5:00AMb)block all ICMP trafficc)stop incoming traffic from a specific IP address but allow outgoing traffic to the same IP addressd)block TCP traffic from a specific user on a multi-user system during 9:00PM and 5:00AMCorrect answer is option 'A'. Can you explain this answer? tests, examples and also practice Computer Science Engineering (CSE) tests.
Explore Courses for Computer Science Engineering (CSE) exam

Top Courses for Computer Science Engineering (CSE)

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev