CCNA Security HW 3 & 4 (also exam review)

Question 1 of 16

1

Which statement describes a stateful firewall?

Select one of the following:

It can only filter packets based on limited Layer 3 and 4 information.
It can filter packets based on information at Layers 3, 4, 5 and 7 of the OSI reference model.
It can expand the number of IP addresses available and can hide network addressing design.
It can determine if the connection is in the initiation, data transfer, or termination phase.

Explanation

Question 2 of 16

1

What are two characteristics of ACLs? (Choose two.)

Select one or more of the following:

Extended ACLs can filter on destination TCP and UDP ports.
Standard ACLs can filter on source TCP and UDP ports.
Extended ACLs can filter on source and destination IP addresses.
Standard ACLs can filter on source and destination IP addresses.
Standard ACLs can filter on source and destination TCP and UDP ports.

Explanation

Question 3 of 16

1

In general which ICMP message type should be stopped inbound?

Select one of the following:

echo
echo-reply
unreachable
source quench

Explanation

Question 4 of 16

1

Which two types of addresses should be denied inbound on a router interface that attaches to the Internet? (Choose two.)

Select one or more of the following:

private IP addresses
public IP addresses
NAT translated IP addresses
any IP address that starts with the number 127
any IP address that starts with the number 1

Explanation

Question 5 of 16

1

Where is the firewall policy applied when using Classic Firewall?

Select one of the following:

security zones
self zone
multiple zones
interfaces

Explanation

Question 6 of 16

1

Consider the following access list command applied outbound on a router serial interface:
access-list 100 deny icmp 192.168.10.0 0.0.0.255 any echo reply
What is the effect of applying this access list command?

Select one of the following:

The only traffic denied is ICMP-based traffic. All other traffic is allowed.
The only traffic denied is echo-replies sourced from the 192.168.10.0/24 network. All other traffic is allowed.
Users on the 192.168.10.0/24 network are not allowed to transmit traffic to any other destination.
No traffic will be allowed outbound on the serial interface.

Explanation

Question 7 of 16

1

What is the result in the self zone if a router is the source or destination of traffic?

Select one of the following:

No traffic is permitted.
All traffic is permitted.
Only traffic that originates in the router is permitted.
Only traffic that is destined for the router is permitted.

Explanation

Question 8 of 16

1

Consider the configured access list.
R1# show access-lists
extended IP access list 100
deny tcp host 10.1.1.2 host 10.1.1.1 eq telnet
deny tcp host 10.1.2.2 host 10.1.2.1 eq telnet
permit ip any any (15 matches)
What are two characteristics of this access list? (Choose two.)

Select one or more of the following:

The access list has been applied to an interface.
A network administrator would not be able to tell if the access list has been applied to an interface or not.
The 10.1.2.1 device is not allowed to telnet to the 10.1.2.2 device.
Any device on the 10.1.1.0/24 network (except the 10.1.1.2 device) can telnet to the router that has the IP address 10.1.1.1 assigned.
Only the 10.1.1.2 device can telnet to the router that has the 10.1.1.1 IP address assigned.
Any device can telnet to the 10.1.2.1 device.

Explanation

Question 9 of 16

1

Refer to the exhibit. If a hacker on the outside network sends an IP packet with source address 172.30.1.50, destination address 10.0.0.3, source port 23, and destination port 2447, what does the Cisco IOS firewall do with the packet?

Select one of the following:

The packet is forwarded, and an alert is generated.
The packet is forwarded, and no alert is generated.
The initial packet is dropped, but subsequent packets are forwarded.
The packet is dropped.

Explanation

Question 10 of 16

1

Which command is used to activate an IPv6 ACL named ENG_ACL on an interface so that the router filters traffic prior to accessing the routing table?

Select one of the following:

ipv6 access-class ENG_ACL in
ipv6 access-class ENG_ACL out
ipv6 traffic-filter ENG_ACL in
ipv6 traffic-filter ENG_ACL out

Explanation

Question 11 of 16

1

Refer to the exhibit. Which statement describes the function of the ACEs?

Select one of the following:

These ACEs allow for IPv6 neighbor discovery traffic.
These ACEs must be manually added to the end of every IPv6 ACL to allow IPv6 routing to occur.
These ACEs automatically appear at the end of every IPv6 ACL to allow IPv6 routing to occur.
These are optional ACEs that can be added to the end of an IPv6 ACL to allow ICMP messages that are defined in object groups named nd-na and nd-ns.

Explanation

Question 12 of 16

1

A router has been configured as a classic firewall and an inbound ACL applied to the external interface. Which action does the router take after inbound-to-outbound traffic is inspected and a new entry is created in the state table?

Select one of the following:

A dynamic ACL entry is added to the external interface in the inbound direction.
The internal interface ACL is reconfigured to allow the host IP address access to the Internet.
The entry remains in the state table after the session is terminated so that it can be reused by the host.
When traffic returns from its destination, it is reinspected, and a new entry is added to the state table.

Explanation

Question 13 of 16

1

If the provided statements are in the same ACL, which statement should be listed first in the ACL according to best practice?

Select one of the following:

permit ip any any
permit udp 172.16.0.0 0.0.255.255 host 172.16.1.5 eq snmptrap
permit tcp 172.16.0.0 0.0.3.255 any established
permit udp any any range 10000 20000
deny udp any host 172.16.1.5 eq snmptrap
deny tcp any any eq telnet

Explanation

Question 14 of 16

1

Which command will verify a Zone-Based Policy Firewall configuration?

Select one of the following:

show interfaces
show protocols
show zones
show running-config

Explanation

Question 15 of 16

1

Refer to the exhibit. The network "A" contains multiple corporate servers that are accessed by hosts from the Internet for information about the corporation. What term is used to describe the network marked as "A"?

Select one of the following:

DMZ
internal network
perimeter security boundary
untrusted network

Explanation

Question 16 of 16

1

When a Cisco IOS Zone-Based Policy Firewall is being configured, which two options can be configured to a traffic class? (Choose two of the best.)

Select one or more of the following:

log
hold
drop
inspect
copy
forward

	Created by Anthony Schulmeister over 7 years ago

CCNA Security HW 3 & 4 (also exam review) Professor Shirong Du University of Akron

CCNA Security HW 3 & 4 (also exam review)

Question 1 of 16

Which statement describes a stateful firewall?

Select one of the following:

Explanation

Question 2 of 16

What are two characteristics of ACLs? (Choose two.)

Select one or more of the following:

Explanation

Question 3 of 16

In general which ICMP message type should be stopped inbound?

Select one of the following:

Explanation

Question 4 of 16

Which two types of addresses should be denied inbound on a router interface that attaches to the Internet? (Choose two.)

Select one or more of the following:

Explanation

Question 5 of 16

Where is the firewall policy applied when using Classic Firewall?

Select one of the following:

Explanation

Question 6 of 16

Consider the following access list command applied outbound on a router serial interface: access-list 100 deny icmp 192.168.10.0 0.0.0.255 any echo reply What is the effect of applying this access list command?

Select one of the following:

Explanation

Question 7 of 16

What is the result in the self zone if a router is the source or destination of traffic?

Select one of the following:

Explanation

Question 8 of 16

Consider the configured access list. R1# show access-lists extended IP access list 100 deny tcp host 10.1.1.2 host 10.1.1.1 eq telnet deny tcp host 10.1.2.2 host 10.1.2.1 eq telnet permit ip any any (15 matches) What are two characteristics of this access list? (Choose two.)

Select one or more of the following:

Explanation

Question 9 of 16

Refer to the exhibit. If a hacker on the outside network sends an IP packet with source address 172.30.1.50, destination address 10.0.0.3, source port 23, and destination port 2447, what does the Cisco IOS firewall do with the packet?

Select one of the following:

Explanation

Question 10 of 16

Which command is used to activate an IPv6 ACL named ENG_ACL on an interface so that the router filters traffic prior to accessing the routing table?

Select one of the following:

Explanation

Question 11 of 16

Refer to the exhibit. Which statement describes the function of the ACEs?

Select one of the following:

Explanation

Question 12 of 16

A router has been configured as a classic firewall and an inbound ACL applied to the external interface. Which action does the router take after inbound-to-outbound traffic is inspected and a new entry is created in the state table?

Select one of the following:

Explanation

Question 13 of 16

If the provided statements are in the same ACL, which statement should be listed first in the ACL according to best practice?

Select one of the following:

Explanation

Question 14 of 16

Which command will verify a Zone-Based Policy Firewall configuration?

Select one of the following:

Explanation

Question 15 of 16

Refer to the exhibit. The network "A" contains multiple corporate servers that are accessed by hosts from the Internet for information about the corporation. What term is used to describe the network marked as "A"?

Select one of the following:

Explanation

Question 16 of 16

When a Cisco IOS Zone-Based Policy Firewall is being configured, which two options can be configured to a traffic class? (Choose two of the best.)

Select one or more of the following:

Explanation

Consider the following access list command applied outbound on a router serial interface:
access-list 100 deny icmp 192.168.10.0 0.0.0.255 any echo reply
What is the effect of applying this access list command?

Consider the configured access list.
R1# show access-lists
extended IP access list 100
deny tcp host 10.1.1.2 host 10.1.1.1 eq telnet
deny tcp host 10.1.2.2 host 10.1.2.1 eq telnet
permit ip any any (15 matches)
What are two characteristics of this access list? (Choose two.)