Question 1

One difference between a switch and a router is that a router will only process messages addressed to the router at layer 2), while a switch processes all messages.

Accepted Answer

A) True 
 B)False  True

Question 2

What are some business trends we are seeing in backbone networks?

Accepted Answer

As of my last update in early 2023, several business trends have been emerging in the area of backbone networks, which are the central, high-capacity network segments that connect various subnetworks and ensure efficient data communication. Here are some of the key trends:

1. **Increased Bandwidth Demand**: With the proliferation of data-intensive applications, such as video streaming, cloud computing, and the Internet of Things (IoT), there is a growing need for higher bandwidth in backbone networks. Businesses are upgrading their infrastructure to support 100Gbps speeds and beyond to accommodate this demand.

2. **Adoption of SDN and NFV**: Software-Defined Networking (SDN) and Network Functions Virtualization (NFV) are becoming more prevalent in backbone networks. These technologies offer greater flexibility and programmability, allowing network operators to manage and optimize their networks more efficiently and dynamically allocate resources as needed.

3. **Deployment of 5G Technology**: The rollout of 5G networks is influencing backbone network infrastructure. To support the high-speed, low-latency requirements of 5G, backbone networks are being upgraded to handle increased traffic and to connect a multitude of new devices and services.

4. **Edge Computing**: As computing moves closer to the data source to reduce latency, backbone networks are being restructured to support edge computing architectures. This involves creating more points of presence and distributing processing capabilities to various edge locations.

5. **Network Security Enhancements**: As cyber threats continue to evolve, businesses are investing in advanced security measures for their backbone networks. This includes the deployment of sophisticated encryption, intrusion detection systems, and continuous monitoring solutions to protect data integrity and privacy.

6. **Fiber Optic Expansion**: Fiber optic technology remains the backbone of high-speed internet. There is a continuous trend towards expanding fiber optic infrastructure to support the increasing data traffic and to provide the necessary bandwidth for modern applications.

7. **Automation and AI**: Artificial intelligence (AI) and automation are being integrated into backbone networks to improve performance and reliability. AI can predict traffic patterns, detect anomalies, and automate routine tasks, which helps in optimizing network operations and reducing downtime.

8. **Sustainability Initiatives**: There is a growing emphasis on making backbone networks more energy-efficient and sustainable. This includes the use of renewable energy sources, more efficient cooling systems, and equipment that consumes less power.

9. **Diversification of Internet Transit Links**: To ensure resilience and reduce the risk of outages, businesses are diversifying their internet transit links. This involves using multiple backbone providers and creating redundant paths to ensure continuous service availability.

10. **Interconnectivity and Peering**: There is an increasing trend towards direct peering and interconnectivity between different network operators. This reduces the dependency on third-party transit providers and can improve performance and reduce costs.

These trends reflect the ongoing evolution of backbone networks as they adapt to new technologies and the ever-increasing demands of the digital world. Businesses that stay abreast of these trends and invest in their network infrastructure accordingly can gain a competitive edge and ensure they meet the needs of their customers and users.

Question 3

A backbone network that connects many backbone networks spanning several buildings at a single location is often called an Internet backbone.

Accepted Answer

A) True 
 B)False  False

Question 4

Which of the following is not true about multi-switch VLANs?

Accepted Answer

A) Several switches are used to build a VLAN 
B) The switches in the VLAN can send packets among themselves in a way that identifies the VLAN to which the frame belongs. 
C) In some multi-switch VLANs, the Ethernet frame is modified based on the emerging IEEE 802.1q standard. 
D) In some multi-switch VLANs, a new VLAN packet encapsulates the Ethernet packet. 
E) VLAN configurations are limited to spanning over no more than two switches. 
A) Several switches are used to build a VLAN 
B) The switches in the VLAN can send packets among themselves in a way that identifies the VLAN to which the frame belongs. 
C) In some multi-switch VLANs, the Ethernet frame is modified based on the emerging IEEE 802.1q standard. 
D) In some multi-switch VLANs, a new VLAN packet encapsulates the Ethernet packet. 
E) VLAN configurations are limited to spanning over no more than two switches.

Question 5

Describe how ACLs can be used to increase network security.

Accepted Answer

Access Control Lists (ACLs) are a fundam

Question 6

Even though the access layer isn't part of the backbone, why is it important to the backbone?

Accepted Answer

The access layer, while not a part of th

Question 7

The _________ is the part of the backbone that connects the different backbones together.

Accepted Answer

A) Access layer 
B) Distribution layer 
C) Core layer 
D) Privacy layer 
E) Switched layer 
A) Access layer 
B) Distribution layer 
C) Core layer 
D) Privacy layer 
E) Switched layer

Question 8

Routers operate at the application layer.

Accepted Answer

A) True 
 B)False

Question 9

Routers:

Accepted Answer

A) operate at the application layer 
B) operate only at the physical layer 
C) cannot connect two or more networks that use the same type of cable 
D) may also be called TCP/IP gateways 
E) operate only at the data link layer 
A) operate at the application layer 
B) operate only at the physical layer 
C) cannot connect two or more networks that use the same type of cable 
D) may also be called TCP/IP gateways 
E) operate only at the data link layer

Question 10

Computers can be assigned to a VLAN based on the ________.

Accepted Answer

A) IEEE 802.1q standard 
B) NIC interface 
C) physical port on the switch 
D) IEEE 802.3 standard 
E) physical location of the computer 
A) IEEE 802.1q standard 
B) NIC interface 
C) physical port on the switch 
D) IEEE 802.3 standard 
E) physical location of the computer

Question 11

Most backbone devices are store-and-forward devices.One simple way to improve performance is to ensure that they have ________________.

Accepted Answer

A) enough ports 
B) sufficient memory 
C) twisted pair connections 
D) large wheels 
E) IEEE 802.11 
A) enough ports 
B) sufficient memory 
C) twisted pair connections 
D) large wheels 
E) IEEE 802.11

Question 12

A routed backbone tends to be used more for large networks than VLANs, although VLAN high speed switches and this new type of LAN-BN architecture are now being considered.

Accepted Answer

A) True 
 B)False

Question 13

The distribution layer of a backbone connects LANs together.

Accepted Answer

A) True 
 B)False

Question 14

Layer-3 switches switch messages based only on their data link layer address.

Accepted Answer

A) True 
 B)False

Question 15

What is a backbone network? What is typical of this kind of network?

Accepted Answer

A backbone network, also known as a netw

Question 16

Which of the following is true regarding switched backbones?

Accepted Answer

A) They place all network devices for one part of the building physically in the same room, often in a rack of equipment 
B) They have an advantage of requiring less cable 
C) They make it more difficult to move computers from one LAN to another 
D) Network capacity is always tied to the physical location of the computers 
E) They are harder to maintain and upgrade than a BN that is not rack-based 
A) They place all network devices for one part of the building physically in the same room, often in a rack of equipment 
B) They have an advantage of requiring less cable 
C) They make it more difficult to move computers from one LAN to another 
D) Network capacity is always tied to the physical location of the computers 
E) They are harder to maintain and upgrade than a BN that is not rack-based

Question 17

List and describe five managerial factors to consider when selecting best practices for a backbone network design.

Accepted Answer

1. Scalability: When selecting best prac

Question 18

What are the main benefits of Virtual LANs?

Accepted Answer

Virtual LANs (VLANs) offer several benef

Question 19

VLANs provide faster performance compared to switched, collapsed or routed backbone architectures.

Accepted Answer

A) True 
 B)False

Question 20

VLANs prioritize traffic based on the ______.

Accepted Answer

A) IEEE 802.1q standard 
B) IEEE 802.11 standard 
C) VLAN size 
D) multiswitch allocation 
E) switch dynamics 
A) IEEE 802.1q standard 
B) IEEE 802.11 standard 
C) VLAN size 
D) multiswitch allocation 
E) switch dynamics

One difference between a switch and a router is that a router will only process messages addressed to the router at layer 2), while a switch processes all messages.

What are some business trends we are seeing in backbone networks?

A backbone network that connects many backbone networks spanning several buildings at a single location is often called an Internet backbone.

Which of the following is not true about multi-switch VLANs?

Describe how ACLs can be used to increase network security.

Even though the access layer isn't part of the backbone, why is it important to the backbone?

The _________ is the part of the backbone that connects the different backbones together.

Routers operate at the application layer.

Routers:

Computers can be assigned to a VLAN based on the ________.

Most backbone devices are store-and-forward devices.One simple way to improve performance is to ensure that they have ________________.

A routed backbone tends to be used more for large networks than VLANs, although VLAN high speed switches and this new type of LAN-BN architecture are now being considered.

The distribution layer of a backbone connects LANs together.

Layer-3 switches switch messages based only on their data link layer address.

What is a backbone network? What is typical of this kind of network?

Which of the following is true regarding switched backbones?

List and describe five managerial factors to consider when selecting best practices for a backbone network design.

What are the main benefits of Virtual LANs?

VLANs provide faster performance compared to switched, collapsed or routed backbone architectures.

VLANs prioritize traffic based on the ______.

Introduction to Data Communications

Application Layer

Physical Layer

Data Link Layer

Network and Transport Layers

Network Design

Wired and Wireless Local Area Networks

Wide Area Networks

The Internet

Network Security

Network Management

Filters

Exam 8: Backbone Networks

One difference between a switch and a router is that a router will only process messages addressed to the router at layer 2), while a switch processes all messages.

What are some business trends we are seeing in backbone networks?

A backbone network that connects many backbone networks spanning several buildings at a single location is often called an Internet backbone.

Which of the following is not true about multi-switch VLANs?

Describe how ACLs can be used to increase network security.

Even though the access layer isn't part of the backbone, why is it important to the backbone?

The _________ is the part of the backbone that connects the different backbones together.

Routers operate at the application layer.

Routers:

Computers can be assigned to a VLAN based on the ________.

Most backbone devices are store-and-forward devices.One simple way to improve performance is to ensure that they have ________________.

A routed backbone tends to be used more for large networks than VLANs, although VLAN high speed switches and this new type of LAN-BN architecture are now being considered.

The distribution layer of a backbone connects LANs together.

Layer-3 switches switch messages based only on their data link layer address.

What is a backbone network? What is typical of this kind of network?

Which of the following is true regarding switched backbones?

List and describe five managerial factors to consider when selecting best practices for a backbone network design.

What are the main benefits of Virtual LANs?

VLANs provide faster performance compared to switched, collapsed or routed backbone architectures.

VLANs prioritize traffic based on the ______.

Introduction to Data Communications

Application Layer

Physical Layer

Data Link Layer

Network and Transport Layers

Network Design

Wired and Wireless Local Area Networks

Wide Area Networks

The Internet

Network Security

Network Management

Filters