Differentiate full-duplex from half-duplex.
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As the system administrator, you type "ppp authentication chap pap secret". Which authentication method is used first in setting up a session? A. secret B. PAP C. CHAP D. PPP/SLIP
Which protocol will send a message to routers if a network outage or congestion occurs? A.) ARP B.) TCP C.) IP D.) ICMP
Explain the difference between named and extended acl?
Why ESP Transport mode is not compatible with NAT????? Though New IP Header in Tunnel mode & Original IP Header in Transport mode are out of Authentication & Encryption.
Which Circuit is mostly used by Clients in Frame-Relay PVC or SVC ?
Given the following IP address from the Class C address range 192.168.21.12. Your network plan needs addresses for 28 small prkps Each office uses its own shored. The network design specifies that you confound for five bits of subnetting. When you confound for this in Cisco IOS software which shored mask should you use? A. 255.255.0.28 B. 255.255.255.0 C. 255.255.255.28 D. 255.255.255.248 E. 255.255.255.252
Identify the hardware component that stores the bootstrap program? A.) ROM B.) NVRAM C.) Booter load D.) RAM E.) Flash
Select the physical interfaces that PPP can be configured on a Cisco router: A. Asynchronous serial B. HSSI C. ISDN D. Synchronous serial
Layer 1 and Layer 2 devices must forward a broadcast. Which of the following devices fall into this category? Gateway Switch Router All of the above.
Which of the following is true regarding standard ISDN BRI service? A.) ISDN BRI B channels are typically 64K. B.) ISDN BRI can handle only voice. C.) ISDN BRI can handle only data. D.) ISDN BRI has 2B and 1D channels. E.) ISDN BRI D channels are 16K. F.) ISDN BRI can handle voice and data.
ip dhcp excluded-address 192.168.0.1 192.168.0.19 what is the use of that command can any one explain it
What is the 5-4-3-2-1 rule of network design?
CCNA 
