Networking Concepts and Security

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Questions and Answers

Which of the following statements correctly describe the Domain Name System (DNS)?

DNS servers only work with domain names and do not interact with IP addresses.

DNS servers maintain a directory of domain names and translate them to IP (Internet Protocol) addresses. (correct)

DNS servers are responsible for managing the IP address space.

DNS servers are used for encrypting data sent over the internet.

Where does a DNS server look up when it cannot resolve a query from its own zone records or cache?

Root DNS Server

Which of the following applications rely on Domain Name System (DNS) functionality to connect network resources?

Email client

Web-based application (correct)

File sharing application

All of the above (correct)

Which of the following statements are true regarding Network Address Translation (NAT)?

NAT enables private IP networks that use private IP addresses to connect to the Internet. Signup and view all the answers

Which of the following statements is NOT correct regarding Telnet?

Telnet is an outdated protocol and is rarely used for secure communication. Signup and view all the answers

Which of the following statements describe the features of Denial-of-Service (DoS) attacks?

DoS attacks allow an attacker to scale up an attack against a target device. Signup and view all the answers

Which of the following is FALSE about a digital signature?

When a digital signature is verified, the signature is decrypted using the signer's private key to produce the original digital fingerprint. Signup and view all the answers

Which of the following are considered as barriers to IPv6 adoption?

Cost of transitioning to IPv6. Signup and view all the answers

Which of the following are true about firewalls?

Firewalls are designed to prevent unauthorized access to a network. Signup and view all the answers

Www.qut.edu.au is a fully qualified domain name (FQDN), in which www and qut.edu.au are respectively known as and .

Host name and domain name Signup and view all the answers

Which of the following statements are true about authentication, authorization, and auditing?

Authentication verifies the identity of a user or system. Signup and view all the answers

Why is it important for security analysts to understand how ICMP (Internet Control Message Protocol) activity works and what normal ICMP activity looks like?

It enables them to detect ARP (Address Resolution Protocol) Poisoning attacks. Signup and view all the answers

Which of the following notations is the preferred representation of the IPv6 address 2001:0DB8:0000:0000:0010:0000:0101:3110?

2001:0DB8::10:0:101:3110 Signup and view all the answers

Which of the following statements is FALSE regarding Virtual Private Networks (VPNs)?

VPNs can protect data in transit and data at rest. Signup and view all the answers

Which of the following statements are TRUE regarding wireless signal propagation?

Attenuation describes how wireless signals weaken as they move away from the transmission source. Signup and view all the answers

Which of the following represents the entire network for this company?

200.10.0.0/22 Signup and view all the answers

Which of the following IP addresses is the network address of the first subnet?

200.10.0.0/24 Signup and view all the answers

Which of the following IP addresses is the broadcast address from the first subnet?

200.10.0.255/24 Signup and view all the answers

Which of the following IP addresses is the network address from the third subnet?

200.10.1.0/24 Signup and view all the answers

Which of the following IP addresses is the first valid address from the fourth subnet?

200.10.2.128/25 Signup and view all the answers

Which of the following IP addresses is the network address from the last subnet?

200.10.3.192/26 Signup and view all the answers

Which of the following IP addresses is the last valid address from the last subnet?

200.10.3.254/26 Signup and view all the answers

From R1's perspective, what is the next-hop address to reach a destination host on network 192.0.3.0/24?

192.0.2.1 Signup and view all the answers

From R2's perspective, what is the next-hop address to reach a destination host on network 192.0.1.0/24?

192.0.1.1 Signup and view all the answers

Which of the following is the most preferred route to configure static routing on R2?

A route 192.0.1.0/24 pointed to 192.0.0.1 Signup and view all the answers

Which of the following needs to be configured with static routing on the ISP router?

A route 0.0.0.0/0 pointed to 200.0.0.1 Signup and view all the answers

Which of the following is the most preferred route to reach 192.0.2.0/24 and 192.0.3.0/24 from R1?

A route 192.0.3.0/24 pointed to 192.0.0.2 Signup and view all the answers

Study Notes

Domain Name System (DNS)

DNS servers maintain a directory of domain names and translate them to IP addresses.
When a DNS server cannot resolve a query internally, it consults a Root DNS server.

Web-based Applications and DNS

Web-based applications rely on DNS functionality to connect to network resources.

Network Address Translation (NAT)

NAT enables private IP networks to connect to the internet.

Telnet

Using Telnet to connect to a remote host is a security risk because Telnet data is sent in clear text.

Denial-of-Service (DoS) Attacks

DoS attacks allow an attacker to scale up an attack on a target device.

Digital Signatures

When a digital signature is verified, the private key is used to produce the original digital fingerprint.

IPv6 Adoption Barriers

Cost is a barrier to IPv6 adoption.

Firewalls

Next-generation firewalls can prevent intrusions and inspect packets for embedded threats.

Fully Qualified Domain Names (FQDNs)

www.qut.edu.au is a FQDN, where 'www' and 'qut.edu.au' represent the host name and domain name, respectively.

Authentication, Authorization, and Auditing

Auditing logs security events and maintains evidence of security attempts.

Internet Control Message Protocol (ICMP)

Understanding ICMP activity is important for detecting ARP poisoning attacks.

Stateless Address Autoconfiguration (SLAAC)

SLAAC enables computers to auto-configure their IPv6 address locally.
It generates an IPv6 address using FE08::/64.

Internet of Things (IoT) Communication Technologies

Zigbee operates in the 2.4 GHz band for short-range communication in IoT networks.

IPv6 representation

The preferred representation for the IPv6 address 2001:0DB8:0000:0000:0010:0000:0101:3110 is 2001:DB8::10:0:101:3110.

Virtual Private Networks (VPNs)

VPNs protect data in transit and at-rest.

Wireless Signal Propagation

Attenuation describes how wireless signals weaken as they move away from the source.

Network representation (Subnets)

200.10.0.0/22 represents the entire network.
200.10.0.0/24 is the network address of the first subnet.

IP Address (Broadcast, Network, First Valid, Last Valid)

200.10.0.255/24 is the broadcast address of the first subnet.
200.10.1.0/24 is the network address for the third subnet
200.10.2.128/25 is the first valid address of the fourth subnet.
200.10.3.192/26 is the network address of the last subnet.
200.10.3.254/26 is the last valid address of the last subnet.

Static Routing

A route 192.0.1.0/24 pointed to 192.0.0.1 is the preferred route for static routing on R2.
A route 0.0.0.0/0 pointed to 200.0.0.1 is needed to be configured on the ISP router
192.0.3.0/24 pointed to 192.0.0.2 is the most preferred route for R1.

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Description

Test your knowledge on essential networking concepts including DNS, NAT, and security measures like firewalls and DoS attacks. This quiz delves into how these elements interact in modern web-based applications and the challenges of evolving technologies like IPv6. Brush up on your understanding of digital signatures and the importance of securing data transfers.