23. Which layer of the 7 layer model is responsible for representing the application information between 2 different OS’s? For example, converting ASCII to EBCIDIC. A.) Transport B.) Physical C.) Application D.) Network E.) Session F.) Presentation 

F. Presentation Layer Accepts data from application layer and negotiates data representation, syntax, compression and encryption. Examples: ASCII, EBCDIC, JPEG, GIF, PICT, MIDI, MPEG 

24. How do you view all debugging that is currently enabled? A.) show running-config B.) show startup-config C.) show debug D.) debug update E.) show flash F.) show version 

C. 

25. Which of the following is an example of the Network Layer? A.) SQL B.) LLC C.) TCP D.) IP E.) Token Ring 

D Most protocol suites have differnet OSI layer protocols within them. At layer 3, IP is for TCP/IP. TCP is layer 4. IPX is for IPX/SPX. SPX is layer 4.DDP is for Appletalk 

26. Which type of switching is considered to be ’wire speed?’ A.) Inverted B.) Layer 4 C.) Cut-Through D.) Multiplexed E.) Layer 3 F.) Store and Forward 

C 

27. On an ISDN BRI interface, the control channel is the ’D’ channel. What is the rate of this channel? A.) 1.544 Mbps B.) 2.048 Mbps C.) 128 Kbps D.) 16 Kbps E.) 64 Kbps 

D 

28 Which commands are valid to turn off all debugging? ( 2 answers) A.) clear logging B.) no debug C.) no logging D.) clear debug E.) undebug all F.) no debug all 

E F 

29. Which of the following are valid Host ID’s for 157.89.9.50 /28 (12 bits of subnetting)? A.) 157.89.9.49 - 157.89.9.64 B.) 157.89.0.0 - 157.89.255.255 C.) 157.89.9.0 - 157.89.9.255 D.) 157.89.9.32 - 157.89.9.63 E.) 157.89.9.49 - 157.89.9.62 

E Below is a very easy to use shortcut that requires no binary math: Figure out the mask: /28 = 255.255.255.240 Figure out the subnet multiple: 256-240=16 Subnets are 16,32,48,64,80, etc This is subnet 48, next subnet is 64, so the broadcast address is 63! Everything between the subnet (48) and broadcast (63) are the valid hosts. In this example, based on the given mask, the valid host ranges are 49-62. 

30. What is a characteristic of Store and Forward switches? A.) They decrease latency. B.) They forward the frame before it is completely read. C.) They are the same a Cut-Through switching. D.) They read the entire frame and check CRC before forwarding. E.) They work at wire speed. 

D 

31. Given the following address: 157.89.8.64 255.255.0.0 which part represents the host portion of the address? A.) 0.89.8.64 B.) 0.0.8.64 C.) 157.89.0.0 D.) 157.0.0.0 E.) 0.0.0.64 

B Using the subnet mask 255.255.0.0, the first 16 bits represent the network, the last 16 bits represent the host. 

32. Which ISDN specification series deals with Concepts and Terminology? A.) F-Series B.) I- Series C.) World Series D.) 911-Series E.) Q-Series F.) J-Series 

B The 2 most important ISDN specifications are Q & I: Q - Call setup and teardown. I - Concepts and terminology. 

33. Which command would change the Cisco Discovery Protocol (CDP) update to 90 second intervals? A.) cdp router 90 B.) router cdp 90 C.) cdp timer 1.5 D.) set timer cdp=1.5 E.) cdp timer 90 F.) timer cdp 1.5 

E 

34. Which command will copy the routers configuration script from RAM to NVRAM? A.) copy running-config startup-config B.) NVRAM is read-only, so this is not possible. C.) save ram nvram D.) save ram E.) copy all 

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