CiscoKits asked:

www.CiscoKits.com CCNA Video describing what a loopback interface is and how to use it on a Cisco Router in your home CCNA certification lab. http … “ccna video” router ccna cisco “ccna exam” ccnp ccie “cisco certification” “ccna kit” “ccna certification” “cisco ccna training” “ccna cbt” “training classes” “online ccna training classes” “ccna training videos” 640-802 640-822 640-816 “ccna test” “CCNA practice” “ccna study guide”

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pass4sureexam asked:

not known by the router’s routing table are sent to the default route. This route generally leads to another router, which treats the packet the same way: If the route is known, the packet will get forwarded to the known route. If not, the packet is forwarded to the default-route of that router which generally leads to another router. And so on. Each router traversal adds a one-hop distance to the route. pass4sure help you pass any IT exam! … CCNA 640-802 routing “default route” pass4sure …

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Ravii Kumarr asked:


CBAC Overview

The Cisco IOS Firewall Feature Set is a module that can be added to the existing IOS to provide firewall functionality without the need for hardware upgrades. There are two components to the Cisco IOS Firewall Feature Set in Intrusion Detection (which is an optional bolt-on) and Context-Based Access Control (CBAC). CBAC maintains a state table for all of the outbound connections on a Cisco router by inspecting tcp and udp connections at layer seven of the OSI model and populating the table accordingly. When return traffic is received on the external interface it is compared against the state table to see if the connection was originally established from within the internal network, and then either permitted or denied. Although basic this is a very effective mechanism to prevent unauthorized access to the internal network from external sources such as the internet.

CBAC Application-specific support

Cisco have also built in some additional functionality into CBAC in terms of application-specific inspection that enables the router to recognize and identify application specific data flows such as HTTP, SMTP, TFTP, and FTP. Understanding these applications and their data flows empowers the router to identify malformed packets or suspect application data flows and permit or deny accordingly. CBAC also provides the flexibility of downloading Java code from trusted sites, but it denying untrusted sites.

CBAC and Denial of Service (DOS) Attacks

Denial-Of-Service (DOS) attack protection is also in-built with real-time logging of alerts as well as pro-active responses to mitigate the threat. To do this CBAC can be configured to manage half-open TCP connections which are used in TCP SYN flood attacks to overload a targets resources resulting in a denial of service to legitimate users. To do this CBAC uses timeouts and thresholds, which are configurable, to determine how long state information for each connection should be kept for sessions and when to drop them. Note that UDP and ICMP require that an idle-timer limit is used to determine when a connection should be terminated. A very useful command to identify a DOS attack is ‘ip inspect audit-trail’ which logs all DOS connections including source and destination IP address and TCP or UDP ports allowing you to pin-point the exact source and destination of the attack.

Configuring CBAC

There are five steps to configuring CBAC on a Cisco router in order for it to function correctly. These are as follows:

1. Choose an interface to which inspection will be applied. This can be an internal or external interface as CBAC is only concerned with the direction of the first packet initiating the connection which is identified when applying CBAC to an interface.

2. Configure an IP access list in the correct direction on the selected interface to allow traffic through for CBAC to inspect.

3. Configure global timeouts and thresholds for established connections or sessions.

4. Define an inspection rule specifying exactly which protocols will be inspected by CBAC.

5. Apply the inspection rule to the interface in the correct direction.



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tonucatien asked:

This video is in the chapter 1 of CCNA Exploration 1 (Network Fundamentals) curriculum. Read more on tonucatien.wordpress.com

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panchotraining asked:

Another example of tricks using a lookup table to work out exam type questions

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Cochinroks asked:

MCP MCSA MCSE Microsoft … MCP MCSA MCSE pearson view prometric pass4sure testking dumps

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TigerDirectBlog asked:

Go to tiger.tv for more information. The HP Pavilion dv6810us Laptop Computer offers high-performance dual-core processing, nVidia GeForce Go 7150M, and the Genuine Windows Vista Home Premium operating system. Plus, this affordable powerhouse boasts a 15.4-inch WXGA High-Definition Brightview Widescreen display, the convenience of Bluetooth, 802.11b/g wireless connectivity, and a LightScribe Super Multi DVD±R/RW optical drive with Double Layer Support. The HP Pavilion dv6810us Laptop …

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Harris Andrea asked:


Solving many practice questions after you study the CCNA theory is the way to go for mastering the CCNA material and get prepared for passing the exam. The following practice exam questions are for the Cisco CCNA 640-802 exam and will definitely help you towards your certification efforts.

Question 1: What command will show you the routed protocols running on your Cisco router?

Answer: show protocols

Question 2: What type of cable should you use to connect to the console port of a Cisco router?

Answer: Rollover cable

Question 3: What type of ethernet cable should you use to connect a Hub and a Switch or two Switches?

Answer: Crossover cable

Question4: RIP uses bandwidth and delay to the determine the best path to a destination network (True/False)

Answer: False. RIP uses only hop count

Question 5: Which statement about MAC addresses is correct?

A. The MAC address can never be changed.

B. A MAC address is represented by binary digits that are organized in pairs.

C. A MAC address is a number in hexadecimal format that is physically located on the NIC.

D. It is not necessary for a device to have a unique MAC address to participate in the network.

Answer: C

Question 6: Which of the following is an IOS command that can be used to increase the security of unused switch ports?

A. Port security

B. Mac-secure

C. Firewall

D. Shutdown

Answer: D

Question 7: IP addresses are represented by:

A. 16-bit decimal numbers

B. 32-bit binary numbers

C. 8 sets of 4-bit decimal numbers

D. 8-bit binary numbers

Answer: B

Question 8: What does the command ip route 192.168.50.0 255.255.255.0 10.2.1.3 specify?

A. The router should use network 192.168.50.0 to get to address 10.2.1.3.

B. Both 192.168.50.0 and 10.2.1.3 use a mask of 255.255.255.0.

C. You want the router to trace a route to network 192.168.50.0 via 10.2.1.3.

D. The router should use address 10.2.1.3 to get to devices on network 192.168.50.0.

Answer: D

Question 9: Which of the following protocols is an example of an exterior gateway protocol?

A. BGP

B. RIP

C. EIGRP

D. OSPF

Answer: A

Question 10: What does the configuration register 0×2102 do?

Answer: Instructs the router to look in NVRAM for the boot sequence.



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pass4sureexam asked:

In the context of computer networking, frame relay consists of an efficient data transmission technique used to send digital information. It is a message forwarding “relay race” like system in which data packets, called frames, are passed from one or many start-points to one or many destinations via a series of intermediate node points.pass4sure help you pass any IT exam! … CCNA 640-802 frame-relay pass4sure

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Puzzled!!! asked:


I currently completed a 2 month course that combined A+ & CCNA certification training & now I’m getting ready for those exams. I’ve read a lot, paid attention in class, did great on hands on training & I’ve always been savvy with the computer, but now I’m worrying that I won’t past the exams. I don’t want to have to pay another time to re-take those exams. Are they difficult?
Any type of assistance is greatly appreciated since I’ll be testing this upcoming weekend!

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