Practice Test: Question Set - 03
1. Most data communications involving telegraph lines use:
- (A) Simplex
lines
- (B) Wideband
channels
- (C) Narrowband
channels
- (D) Dialed
service
2. After coding a document into a digital signal, it can be sent by telephone, telex or satellite to the receiver where the signal is decoded and an exact copy of the original document is made. What is it called?
- (A) Telex
- (B) Word
processor
- (C) Facsimile
- (D) Electronic
mail
3. Which utility is useful for finding the local host name?
- (A) NBTSTAT
- (B) Netstat
- (C) PING
- (D) Hostname
4. Which layer of international standard organization's OSI model is responsible for creating and recognizing frame boundaries?
- (A) Physical
layer
- (B) Data link
layer
- (C) Transport
layer
- (D) Network
layer
5. Which of the following network access standard is used for connecting stations to a circuit-switched network?
- (A) X.3
- (B) X.21
- (C) X.25
- (D) X.75
6. Many data communication networks have been established which provide a wealth of on-demand information services to people at home. What is the name of the system which provides an interactive, graphics-rich service that permits user to select what they want?
- (A) Teletex
system
- (B) Fax
system
- (C) Videotex
system
- (D) Microwave
system
7. When a host knows its physical address but not its IP address, it can use _______.
- (A) RARP
- (B) ARP
- (C) IGMP
- (D) ICMP
8. An error detecting code is which code is the remainder resulting from dividing the bits to be checked by a predetermined binary number, is known as
- (A) Cyclic
redundancy check
- (B) Checksum
- (C) Error
detecting code
- (D) Error rate
9. An encyclopedic database
- (A) Is
an information utility that specializes in storing and searching information
- (B) Is generally
free
- (C) Is
easy for beginners to use
- (D) All
of the above
10. After you have verified that TCP/IP is installed correctly, what is the next step in verifying the TCP/IP configuration?
- (A) Ping the
broadcast address
- (B) Ping the
Microsoft Web site
- (C) Ping a
distant router
- (D) Ping the
address of the local host
11. What is the main difference between DDCMP and SDLG?
- (A) DDCMP
does not need special hardware to final the beginning of a message
- (B) DDCMP has a
message header
- (C) SDLC has a
IP address
- (D) SDLC does
not use CRC
12. How many class A, B, and C network IDs can exist?
- (A) 2,113,658
- (B) 16,382
- (C) 126
- (D) 128
13. Which of the following is an important characteristic of LAN?
- (A) Application
independent interfaces
- (B) Unlimited
expansion
- (C) Low cost
access for low bandwidth channels
- (D) Parallel
transmission
14. What is the first octet range for a class A IP address?
- (A) 1 - 126
- (B) 192 - 255
- (C) 192 - 223
- (D) 1 - 127
15. Establishing a virtual connection is functionally equivalent to
- (A) Connecting
as virtual memory
- (B) Physically
connecting a DTE and DCE
- (C) Placing a
telephone call prior to a conversation
- (D) Placing a
modem prior to a conversation
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