Refer to the exhibit.

An engineer must deny Telnet traffic from the loopback interface of router R3 to the loopback interface of router R2 during the weekend hours. All other traffic between the loopback interfaces of routers R3 and R2 must be allowed at all times. Which command accomplish this task?
A)

B)

C)

D)

• A.Option D
• B.Option C
• C.Option A
• D.Option B

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What is the result of applying this access control list?

• A.TCP traffic with the URG bit set is allowed
• B.TCP traffic with the SYN bit set is allowed
• C.TCP traffic with the ACK bit set is allowed
• D.TCP traffic with the DF bit set is allowed

Correct Answer: C

Explanation
The established keyword is only applicable to TCP access list entries to match TCP segments that have the ACK and/or RST control bit set (regardless of the source and destination ports), which assumes that a TCP connection has already been established in one direction only. Let's see an example below:

Suppose you only want to allow the hosts inside your company to telnet to an outside server but not vice versa, you can simply use an "established" access-list like this: access-list 100 permit tcp any any established access-list 101 permit tcp any any eq telnet ! interface S0/0 ip access-group 100 in ip access-group 101 out

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What is the function of cisco DNA center in a cisco SD-access deployment?

• A.It possesses information about all endpoints, nodes and external networks related to the fabric
• B.It is responsible for the design, management, deployment, provisioning and assurance of the fabric network devices.
• C.It is responsible for routing decisions inside the fabric
• D.It provides integration and automation for all nonfabric nodes and their fabric counterparts.

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How are the Cisco Express Forwarding table and the FIB related to each other?

• A.Cisco Express Forwarding uses a FIB to make IP destination prefix-based switching
  decisions correct
• B.The FIB is used to populate the Cisco Express Forwarding table
• C.There can be only one FIB but multiple Cisco Express Forwarding tables on IOS devices
• D.The Cisco Express Forwarding table allows route lookups to be forwarded to the route processor for processing before they are sent to the FIB

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Why would a log file contain a * next to the date?

• A.The network device was receiving NTP time when the log messages were recorded
• B.The network device was unable to reach the NTP server when the log messages were recorded.
• C.The network device is not configured to use NTP
• D.The network device is not configured to use NTP time stamps for logging.

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