Practice Question and Answer
8Q: How does DHCP client ensure that no other computer has its assigned IP address? 3721 05b5cc7e7e4d2b41977751a52
5b5cc7e7e4d2b41977751a52- 1Acknowledge receipt of a TCP segmentfalse
- 2Ping to its own address to see if a response is detectedfalse
- 3Broadcast a Proxy ARPfalse
- 4Broadcast a gratuitous ARPtrue
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Answer : 4. "Broadcast a gratuitous ARP"
Explanation :
Answer: D) Broadcast a gratuitous ARP Explanation: To stop possible address conflicts , a DHCP client will use gratuitous ARP (broadcast an ARP request for its own IP address) to see if another host responds.
Q: What must happen if a DHCP IP conflict occurs? 3312 05b5cc7e7e4d2b41977751a4d
5b5cc7e7e4d2b41977751a4d- 1Proxy ARP will fix the issuefalse
- 2The client uses a gratuitous ARP to fix the issuefalse
- 3The administrator must fix the conflict by hand at the DHCP servertrue
- 4The DHCP server will reassign new IP addresses to both computersfalse
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Answer : 3. "The administrator must fix the conflict by hand at the DHCP server"
Explanation :
Answer: C) The administrator must fix the conflict by hand at the DHCP server Explanation: If a DHCP Conflict is detected, either by the server sending a ping and getting response or by a host using a gratuitous ARP (arp'ing for its own IP address and seeing if a host responds), then the server will hold that address and not use it again until it is fixed by an administrator.
Q: What is the address range of a Class B network address in binary? 1388 05b5cc7e7e4d2b41977751a48
5b5cc7e7e4d2b41977751a48- 101xxxxxxfalse
- 20xxxxxxxfalse
- 310xxxxxxtrue
- 4110xxxxxfalse
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Answer : 3. "10xxxxxx"
Explanation :
Answer: C) 10xxxxxx Explanation: The range of a Class B network address is 128 - 191. This makes our binary range 10xxxxxx.
Q: Which class of IP address provides a maximum of only 254 host addresses per network ID? 1213 05b5cc7e7e4d2b41977751a43
5b5cc7e7e4d2b41977751a43- 1Class Afalse
- 2Class Bfalse
- 3Class Ctrue
- 4Class Dfalse
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Answer : 3. "Class C"
Explanation :
Answer: C) Class C Explanation: Class C network address has only 8 bits for defining hosts : 28-2 = 256 - 2 = 254
Q: Which of the following allows a router to respond to an ARP request that is intended for a remote host? 1472 05b5cc7e7e4d2b41977751a3e
5b5cc7e7e4d2b41977751a3e- 1Gateway DPfalse
- 2Reverse ARP (RARP)false
- 3Proxy ARPtrue
- 4Inverse ARP (IARP)false
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Answer : 3. "Proxy ARP"
Explanation :
Answer: C) Proxy ARP Explanation: Proxy ARP can help machines on a subnet reach remote subnets without configuring routing or a default gateway.
Q: The DoD model (also called the TCP/IP stack) has four layers. Which layer of the DoD model is equivalent to the Network layer of the OSI model? 1658 05b5cc7e7e4d2b41977751a39
5b5cc7e7e4d2b41977751a39- 1Applicationfalse
- 2Host-to-Hostfalse
- 3Internettrue
- 4Network Accessfalse
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Answer : 3. "Internet"
Explanation :
Answer: C) Internet Explanation: The four layers of the DoD model are Application/process, Host-to-Host, Internet, and Network Access. The Internet layer is equivalent to the Network layer of the OSI model.
Q: What layer in the TCP/IP stack is equivalent to the Transport layer of the OSI model? 2051 05b5cc7e7e4d2b41977751a34
5b5cc7e7e4d2b41977751a34- 1Applicationfalse
- 2Host-to-Hosttrue
- 3Internetfalse
- 4Network Accessfalse
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Answer : 2. "Host-to-Host"
Explanation :
Answer: B) Host-to-Host Explanation: The four layers of the TCP/IP stack (also called the DoD model) are Application/process, Host-to-Host, Internet, and Network Access. The Host-to-Host layer is equivalent to the Transport layer of the OSI model.
Q: Which of the following protocols uses both TCP and UDP? 1704 05b5cc7e7e4d2b41977751a2f
5b5cc7e7e4d2b41977751a2f- 1FTPfalse
- 2SMTPfalse
- 3Telnetfalse
- 4DNStrue
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Answer : 4. "DNS"
Explanation :
Answer: D) DNS Explanation: DNS uses TCP for zone exchanges between servers and UDP when a client is trying to resolve a hostname to an IP address.