Internet Bandwidth & Network Routing

Which command displays a concise list of VLAN assignment information on a switch?

sh vlan br

Cloud providers often offer attractive SLAs (service-level agreements) based upon their platform's availability. However, the reliability of the WAN connection that links their resources with a company's network is just as important. To this end, organizations generally offer an array of options.

What are some of those options? Choose all that apply.

-direct connection

-VPN (virtual private network)

Byron is the systems administrator for a midsize company. He has been working with an outside IT firm due to issues with his edge routers. The technician from the IT firm told Byron that they have the same type of router and that Byron needs to update the firmware to get rid of the problem. The odd thing was that the IT technician referred to his router as an "exterior router" and not an "edge router." Why is that?

- An edge router and exterior router can be the same.

What is the purpose of a routing table?

id's where hosts are located

True story: Alexis needed high-bandwidth Internet access because she teaches online and frequently uses the Internet alongside Zoom. She purchased the high-speed package from her cable TV provider, which offered her 500 Mbps download speed and 20 Mbps upload speed. She made sure that her equipment was up-to-date to handle the speed increase. After the modem was installed, she downloaded a software program called Speedtest to confirm that she was getting the speed she was paying for. She tested her connection at different times during the day and discovered that the download speeds she was getting were not always what she paid for. Some days, she would get over 550 Mbps download, while on others she would only get 200 Mbps download. Occasionally, her speed would drop below 100 Mbps, although her upload speed remained between 18 and 20 Mbps. She contacted her carrier to ask about the issue and was told that she was get

- It was the "best effort" by the ISP.

What type of error causes routers to drop messages without any error feedback?

- interface error

Which type of firewall is placed on the edge of the private network, to monitor the connection between a private network and a public network, such as the Internet?

- network-based firewall

What command displays a router's routing table?

- show ip route

Eduardo is responsible for overseeing his company's web server. He purchased a new hardware firewall and now needs to establish some Access Control List (ACL) rules for it. These rules will involve filtering traffic from the web server that is destined for the Internet. Why does Eduardo need to block this outbound traffic from his web server?

- to stop worms from spreading

What happens when no matching route exists for a message?

- The message will be dropped.

At what layer of the OSI model do proxy servers manage security?

- application layer

What can be considered a disadvantage of satellite Internet access?

- Satellite Internet access must have a line-of-sight path.

What is the common routing issue called where NAT (network address translation) and firewalls cannot see traffic in both directions of a conversation, and as a result, they cannot properly apply filtering rules and might incorrectly reject outgoing traffic that should have been approved?

- asymmetrical routing

What are the commands to add a gateway of last resort to a router? Choose all that apply.

- ip default-gateway

- ip default-network

- ip route 0.0.0.0 0.0.0.0

What is a common routing problem whereby a message continuously follows the same path without reaching its destination?

- routing loop

What is the term for the individual geographical locations connected by a WAN?

- WAN site

What factors can determine the size of a cell in cellular service? Choose all that apply.

- cellular traffic

- population

- topology

In order to reach a reasonable level of availability and effectiveness, how must 5G antennas be placed?

Which of these 2 is correct????

- line-of-sight

- close proximity

Cells can be misshapen due to a variety of reasons. What are some of those reasons?

- terrain

- EMI (electromagnetic interference)

- antenna radiation patterns

All cellular networks share a similar infrastructure in which coverage areas are divided into cells. Each cell is served by an array of antennas and its base station. Collectively, what is this setup called?

cell site

Compared to other wireless WAN options, satellite services are faster and suffer less latency.

False

What command is used to list the router's routing table information?

- show ip route

What is the purpose of a wireless WAN?

- high-throughput, long-distance, digital exchange

What command displays physical and data link layer information about a device's ports?

- show interface

What term is used to describe the rating system used as a tiebreaker when a router determines which route to send data through?

- metric

Which command displays detailed VLAN configurations for each of a switch's interfaces?

sh int sw

Even carriers between cells. This transition usually occurs without the user's knowledge or awareness. What is this transition called?

- handoff

What protocol is used by edge routers and exterior routers to distribute data outside of autonomous systems?

EGPs

What type of firewall only protects the computer on which it is installed?

- host-based firewall

4G (fourth generation) cellular service is characterized by an all-IP network for both data and voice transmission. However, speed has been an issue. What generation of cellular service finally brought about true 4G speeds?

LTE-A (LTE-Advanced)

What are some of the benefits of an SD-WAN (software-defined wide area network)? Choose all that apply.

-transport agnostic

- zero-touch provisioning

What is the purpose of an ACL (access control list)?

It acts as a filter to instruct the router to permit or deny traffic.

Which of the following devices are used to connect WANs? Choose all that apply.

- router

- modem

What do the numbers 0.0.0.0 stand for in a routing table? Choose all that apply.

- default route

- gateway of last resort