DCOM 220 Final Netacad Exam Questions and Answers
with complete solution
What are two examples of network problems that are found at the data link layer?
(Choose two.)
framing errors
encapsulation errors
Refer to the exhibit. A network administrator has deployed QoS and has
configured the network to mark traffic on the VoIP phones as well as the Layer 2
and Layer 3 switches. Where should initial marking occur to establish the trust
boundary?
Trust Boundary 1
Which communication protocol allows the creation of a tunnel through the DSL
connection between the customer router and the ISP router to send PPP frames?
PPPoE
Which routing protocol is used to exchange routing information between
autonomous systems on the Internet?
BGP
What is the result of a DHCP starvation attack?
Legitimate clients are unable to lease IP addresses.
What are two benefits of using SNMP traps? (Choose two.)
They eliminate the need for some periodic polling requests.
They reduce the load on network and agent resources.
A small law firm wants to connect to the Internet at relatively high speed but with
low cost. In addition, the firm prefers that the connection be through a dedicated
link to the service provider. Which connection type should be selected?
DSL (Digital Subscriber Line)
Which feature is unique to IPv6 ACLs when compared to those of IPv4 ACLs?
an implicit permit of neighbor discovery packets
Refer to the exhibit. For which autonomous system would running BGP not be
appropriate?
65003
RSPAN depends on which type of VLAN?
RSPAN VLAN
Open the PT Activity. Perform the tasks in the activity instructions and then
answer the question. A user reports that PC0 cannot visit the web server
www.server.com. Troubleshoot the network configuration to identify the problem.
What are three configuration issues that are causing the problem? (Choose
three.)
Routing on HQ is not configured correctly.
SW1 has a port configuration issue.
One of the interfaces on Branch is not activated.
Match the QoS marking field to its corresponding OSI mode(
Layer 2
Experimental (EXP)
, Class of Service (CoS)
Wi-Fi Traffic Identifier (TID)
Layer 3
IP Precedence
Differentiated Services Code Point (DSCP)
Which group of APIs are used by an SDN controller to communicate with various
applications?
northbound APIs
What are three abstraction layers of a computer system?
firmware
hardware
services
Two corporations have just completed a merger. The network engineer has been
asked to connect the two corporate networks without the expense of leased lines.
Which solution would be the most cost effective method of providing a proper
and secure connection between the two corporate networks?
site-to-site VPN
Which two components of a WAN would more likely be used by an ISP? (Choose
two.)
toll network
CO
True or False.
DiffServ is a QoS strategy that enforces end-to-end guarantees.
false
What two functions describe uses of an access control list? (Choose two.)
ACLs provide a basic level of security for network access.
ACLs can control which areas a host can access on a network.
A user is unable to connect to the Internet. The network administrator decides to
use the top-down troubleshooting approach. Which action should the
administrator perform first?
Enter an IP address in the address bar of the web browser to determine if DNS has
failed.
Why is QoS an important issue in a converged network that combines voice,
video, and data communications?
Voice and video communications are more sensitive to latency.
What are two characteristics of voice traffic? (Choose two.)
It is delay sensitive.
It consumes few network resources.
Refer to the exhibit. A small office uses an ISR to provide connectivity for both
wired and wireless computers. One day, a sales person who is using a laptop
cannot connect to Server1 through the wireless network. A network technician
attempts to determine if the problem is on the wireless or the wired network. The
technician pings successfully from the wireless laptop to the default gateway IP
address on the ISR. What should be the next troubleshooting step?
Ping from Server1 to its gateway IP address.
with complete solution
What are two examples of network problems that are found at the data link layer?
(Choose two.)
framing errors
encapsulation errors
Refer to the exhibit. A network administrator has deployed QoS and has
configured the network to mark traffic on the VoIP phones as well as the Layer 2
and Layer 3 switches. Where should initial marking occur to establish the trust
boundary?
Trust Boundary 1
Which communication protocol allows the creation of a tunnel through the DSL
connection between the customer router and the ISP router to send PPP frames?
PPPoE
Which routing protocol is used to exchange routing information between
autonomous systems on the Internet?
BGP
What is the result of a DHCP starvation attack?
Legitimate clients are unable to lease IP addresses.
What are two benefits of using SNMP traps? (Choose two.)
They eliminate the need for some periodic polling requests.
They reduce the load on network and agent resources.
A small law firm wants to connect to the Internet at relatively high speed but with
low cost. In addition, the firm prefers that the connection be through a dedicated
link to the service provider. Which connection type should be selected?
DSL (Digital Subscriber Line)
Which feature is unique to IPv6 ACLs when compared to those of IPv4 ACLs?
an implicit permit of neighbor discovery packets
Refer to the exhibit. For which autonomous system would running BGP not be
appropriate?
65003
RSPAN depends on which type of VLAN?
RSPAN VLAN
Open the PT Activity. Perform the tasks in the activity instructions and then
answer the question. A user reports that PC0 cannot visit the web server
www.server.com. Troubleshoot the network configuration to identify the problem.
What are three configuration issues that are causing the problem? (Choose
three.)
Routing on HQ is not configured correctly.
SW1 has a port configuration issue.
One of the interfaces on Branch is not activated.
Match the QoS marking field to its corresponding OSI mode(
Layer 2
Experimental (EXP)
, Class of Service (CoS)
Wi-Fi Traffic Identifier (TID)
Layer 3
IP Precedence
Differentiated Services Code Point (DSCP)
Which group of APIs are used by an SDN controller to communicate with various
applications?
northbound APIs
What are three abstraction layers of a computer system?
firmware
hardware
services
Two corporations have just completed a merger. The network engineer has been
asked to connect the two corporate networks without the expense of leased lines.
Which solution would be the most cost effective method of providing a proper
and secure connection between the two corporate networks?
site-to-site VPN
Which two components of a WAN would more likely be used by an ISP? (Choose
two.)
toll network
CO
True or False.
DiffServ is a QoS strategy that enforces end-to-end guarantees.
false
What two functions describe uses of an access control list? (Choose two.)
ACLs provide a basic level of security for network access.
ACLs can control which areas a host can access on a network.
A user is unable to connect to the Internet. The network administrator decides to
use the top-down troubleshooting approach. Which action should the
administrator perform first?
Enter an IP address in the address bar of the web browser to determine if DNS has
failed.
Why is QoS an important issue in a converged network that combines voice,
video, and data communications?
Voice and video communications are more sensitive to latency.
What are two characteristics of voice traffic? (Choose two.)
It is delay sensitive.
It consumes few network resources.
Refer to the exhibit. A small office uses an ISR to provide connectivity for both
wired and wireless computers. One day, a sales person who is using a laptop
cannot connect to Server1 through the wireless network. A network technician
attempts to determine if the problem is on the wireless or the wired network. The
technician pings successfully from the wireless laptop to the default gateway IP
address on the ISR. What should be the next troubleshooting step?
Ping from Server1 to its gateway IP address.
