CCNA Security Module 4 100%

CCNAS Module 4 100% 1

For a stateful firewall, which information is stored in the stateful session flow table? TCP control header and trailer information associated with a particular session TCP SYN packets and the associated return ACK packets inside private IP address and the translated inside global IP address outbound and inbound access rules (ACL entries) source and destination IP addresses, and port numbers and sequencing information associated with a particular session 2When

configuring a Cisco IOS zone-based policy firewall, which three actions can be applied to a traffic class? (Choose three.)

drop inspect pass reroute queue shape

3

What is the first step in configuring a Cisco IOS zone-based policy firewall using the CLI? Create zones. Define traffic classes. Define firewall policies. Assign policy maps to zone pairs. Assign router interfaces to zones.

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Refer to the exhibit. Based on the SDM screen shown, which statement describes the zone-based firewall component being configured

a class map that inspects all traffic that uses the HTTP, IM, P2P, and email protocols a class map that prioritizes traffic that uses HTTP first, followed by SMTP, and then DNS a class map that denies all traffic that uses the HTTP, SMTP, and DNS protocols a class map that inspects all traffic that uses the HTTP, SMTP, and DNS protocols a class map that inspects all traffic, except traffic that uses the HTTP, SMTP, and DNS protocols

5

Refer to the exhibit. Based on the SDM screen shown, which two statements describe the effect this zone-based policy firewall has on traffic? (Choose two.) HTTP traffic from the in-zone to the out-zone is inspected. Unmatched traffic to the router from the out-zone is permitted. ICMP replies from the router to the out-zone are denied. Traffic from the in-zone to the out-zone is denied if the source address is in the 127.0.0.0/8 range. Traffic from the in-zone to the out-zone is denied if the destination address is in the 10.1.1.0/29 range.

6

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 port 23, and destination port 2447, what does the Cisco IOS firewall do with the packet? 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.

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Refer to the exhibit. In a two-interface CBAC implementation, where should ACLs be applied? inside interface outside interface inside and outside interfaces no interfaces Which zone-based policy firewall zone is system-defined and applies to traffic destined for the router or originating from the router? 8

self zone system zone local zone inside zone

outside zone

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Which location is recommended for extended numbered or extended named ACLs? a location as close to the destination of traffic as possible a location as close to the source of traffic as possible a location centered between traffic destinations and sources to filter as much traffic as possible if using the established keyword, a location close to the destination to ensure that return traffic is allowed Which type of packets exiting the network of an organization should be blocked by an ACL?

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packets that are not encrypted packets that are not translated with NAT packets with source IP addresses outside of the organization's network address space packets with destination IP addresses outside of the organization's network address space

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Which statement describes the characteristics of packet-filtering and stateful firewalls as they relate to the OSI model? Both stateful and packet-filtering firewalls can filter at the application layer. A stateful firewall can filter application layer information, while a packet-filtering firewall cannot filter beyond the network layer. A packet-filtering firewall typically can filter up to the transport layer, while a stateful firewall can filter up to the session layer. A packet-filtering firewall uses session layer information to track the state of a connection, while a stateful firewall uses application information to track the state of a connection. Which statement accurately describes Cisco IOS zone-based policy firewall operation?

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The pass action works in only one direction. A router interface can belong to multiple zones. Service policies are applied in interface configuration mode. Router management interfaces must be manually assigned to the self zone.

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When logging is enabled for an ACL entry, how does the router switch packets filtered by the ACL? topology-based switching autonomous switching process switching optimum switching When using Cisco IOS zone-based policy firewall, where is the inspection policy applied?

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a global service policy an interface a zone a zone pair 

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Which type of packet is unable to be filtered by an outbound ACL?

ICMP packet broadcast packet multicast packet router-generated packet

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Which statement correctly describes a type of filtering firewall? A transparent firewall is typically implemented on a PC or server with firewall software running on it. A packet-filtering firewall expands the number of IP addresses available and hides network addressing design. An application gateway firewall (proxy firewall) is typically implemented on a router to filter Layer 3 and Layer 4 information. A stateful firewall monitors the state of connections, whether the connection is in an initiation, data transfer, or termination state. Which three actions can a Cisco IOS zone-based policy firewall take if configured with Cisco SDM? (Choose three.)

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inspect evaluate drop analyze pass forward

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

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Refer to the exhibit. The ACL statement is the only one explicitly configured on the router. Based on this information, which two conclusi be drawn regarding remote access network connections? (Choose two.) SSH connections from the 192.168.1.0/24 network to the 192.168.2.0/24 network are allowed. Telnet connections from the 192.168.1.0/24 network to the 192.168.2.0/24 network are allowed. SSH connections from the 192.168.2.0/24 network to the 192.168.1.0/24 network are allowed. Telnet connections from the 192.168.1.0/24 network to the 192.168.2.0/24 network are blocked. SSH connections from the 192.168.1.0/24 network to the 192.168.2.0/24 network are blocked. Telnet connections from the 192.168.2.0/24 network to the 192.168.1.0/24 network are allowed.

20

A router has CBAC configured 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? 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. Which two parameters are tracked by CBAC for TCP traffic but not for UDP traffic? (Choose two.) 21

source port protocol ID sequence number  destination port SYN and ACK flags