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NEW QUESTION: 1
Refer to the exhibit.
Which statement regarding the output is true?
A. Both primary and secondary name servers will clear (refresh) their caches every 7200 seconds to
ensure that up-to-date information is always in use.
B. Email queries concerning this domain should be sent to "[email protected]".
C. If the secondary name server has an SOA record with the serial number of 10973815, it will initiate a
zone transfer on the next cycle.
D. Other DNS servers will cache records from this domain for 864000 seconds (10 days) before
requesting them again.
E. Every 1800 seconds the secondary name server will query the SOA record of the primary name server
for updates.
Answer: C
NEW QUESTION: 2
In Layer 2 topologies, spanning-tree failures can cause loops in the network. These unblocked loops can cause network failures because of excessive traffic. Which two Catalyst 6500 features can be used to limit excessive traffic during spanning-tree loop conditions? (Choose two.)
A. broadcast suppression
B. BPDU guard
C. storm control
D. loop guard
E. storm suppression
Answer: A,C
Explanation:
Explanation Traffic Storm Control A traffic storm occurs when packets flood the LAN, creating excessive traffic and degrading network performance. The traffic storm control feature prevents LAN ports from being disrupted by a broadcast, multicast, or unicast traffic storm on physical interfaces. Traffic storm control (also called traffic suppression) monitors incoming traffic levels over a 1-second traffic storm control interval and, during the interval, compares the traffic level with the traffic storm control level that you configure. The traffic storm control level is a percentage of the total available bandwidth of the port. Each port has a single traffic storm control level that is used for all types of traffic (broadcast, multicast, and unicast). Traffic storm control monitors the level of each traffic type for which you enable traffic storm control in 1-second traffic storm control intervals. Within an interval, when the ingress traffic for which traffic storm control is enabled reaches the traffic storm control level that is configured on the port, traffic storm control drops the traffic until the traffic storm control interval ends. Broadcast suppression Broadcast suppression prevents the switched ports on a LAN from being disrupted by a broadcast storm on one of the ports. A LAN broadcast storm occurs when the broadcast or multicast packets flood the LAN, creating excessive traffic and degrading the network performance. Errors in the protocol-stack implementation or in the network configuration can cause a broadcast storm. Broadcast suppression uses filtering that measures the broadcast activity on a LAN over a time period (15264 nsec to ~1 sec) that varies based on the type of line card and speed setting on the port, and compares the measurement with a predefined threshold. If the threshold is reached, further broadcast activity is suppressed for the duration of a specified time period. Broadcast suppression is disabled by default.
Reference http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SXF/native/configurati on/guide/storm.html\ http://www.cisco.com/en/US/docs/switches/lan/catalyst6500/catos/8.x/configuration/guide/b castsup.html
NEW QUESTION: 3
組織は、リスクの高い監査結果に関連する修復を実行することに同意しました。是正プロセスには、ユーザーの役割の複雑な再編成と、次の監査サイクル内に完了しない可能性があるいくつかの代替コントロールの実装が含まれます。情報監査人が活動をフォローアップするための最良の方法は次のうちどれですか。
A. 修正の進捗状況を定期的に確認します
B. 修正予定日後に統制のレビューをスケジュールする
C. 修正のタイムラインと信頼性を管理者に提供します
D. 監査スケジュールに従って、失敗したコントロールの監査を続行します
Answer: C
NEW QUESTION: 4
There are many firewall implementations provided by firewall manufacturers. Which of the following implementation utilize two packet filtering routers and a bastion host? This approach creates the most secure firewall system since it supports network and application level security while defining a separate DMZ.
A. Anomaly based firewall
B. Screened host firewall
C. Dual Homed firewall
D. Screened subnet firewall
Answer: D
Explanation:
Explanation/Reference:
In network security, a screened subnet firewall is a variation of the dual-homed gateway and screened host firewall. It can be used to separate components of the firewall onto separate systems, thereby achieving greater throughput and flexibility, although at some cost to simplicity. As each component system of the screened subnet firewall needs to implement only a specific task, each system is less complex to configure.
A screened subnet firewall is often used to establish a demilitarized zone (DMZ).
Below are few examples of Firewall implementations:
Screened host Firewall
Utilizing a packet filtering router and a bastion host, this approach implements a basic network layer security and application server security.
An intruder in this configuration has to penetrate two separate systems before the security of the private network can be compromised
This firewall system is configured with the bastion host connected to the private network with a packet filtering router between internet and the bastion host
Dual-homed Firewall
A firewall system that has two or more network interface, each of which is connected to a different network In a firewall configuration, a dual homed firewall system usually acts to block or filter some or all of the traffic trying to pass between the network
A dual-homed firewall system is more restrictive form of screened-host firewall system Demilitarize Zone (DMZ) or screened-subnet firewall
Utilizing two packet filtering routers and a bastion host
This approach creates the most secure firewall system since it supports network and application level security while defining a separate DMZ network
Typically, DMZs are configured to limit access from the internet and organization's private network.
The following were incorrect answers:
The other types of firewall mentioned in the option do not utilize two packet filtering routers and a bastion host.
The following reference(s) were/was used to create this question:
CISA review manual 2014 Page number 346