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- Question
Which of the following describe the DHCP Discover message?
- It uses FF:FF:FF:FF:FF:FF as a layer 2 broadcast.
- It uses UDP as the Transport layer protocol.
- It uses TCP as the Transport layer protocol.
- It does not use a layer 2 destination address.
Options- A. 1 only
- B. 1 and 2
- C. 3 and 4
- D. 4 only
- Correct Answer
- 1 and 2
ExplanationA client that sends out a DHCP Discover message in order to receive an IP address sends out a broadcast at both layer 2 and layer 3. The layer 2 broadcast is all Fs in hex, or FF:FF:FF:FF:FF:FF. The layer 3 broadcast is 255.255.255.255, which means all networks and all hosts. DHCP is connectionless, which means it uses User Datagram Protocol (UDP) at the Transport layer, also called the Host-to-Host layer. - 1. Which of the following protocols uses both TCP and UDP?
Options- A. FTP
- B. SMTP
- C. Telnet
- D. DNS Discuss
- 2. Which of the following is the decimal and hexadecimal equivalents of the binary number 10011101?
Options- A. 155, 0x9B
- B. 157, 0x9D
- C. 159, 0x9F
- D. 185, 0xB9 Discuss
- 3. Which of the following allows a router to respond to an ARP request that is intended for a remote host?
Options- A. Gateway DP
- B. Reverse ARP (RARP)
- C. Proxy ARP
- D. Inverse ARP (IARP) Discuss
- 4. Which statements are true regarding ICMP packets?
- ICMP guarantees datagram delivery.
- ICMP can provide hosts with information about network problems.
- ICMP is encapsulated within IP datagrams.
- ICMP is encapsulated within UDP datagrams.
Options- A. 1 only
- B. 2 and 3
- C. 1 and 4
- D. All of the above Discuss
- 5. If you use either Telnet or FTP, which is the highest layer you are using to transmit data?
Options- A. Application
- B. Presentation
- C. Session
- D. Transport Discuss
- 6. Which class of IP address provides a maximum of only 254 host addresses per network ID?
Options- A. Class A
- B. Class B
- C. Class C
- D. Class D Discuss
- 7. What protocol is used to find the hardware address of a local device?
Options- A. RARP
- B. ARP
- C. IP
- D. ICMP Discuss
- 8. What is the address range of a Class B network address in binary?
Options- A. 01xxxxxx
- B. 0xxxxxxx
- C. 10xxxxxx
- D. 110xxxxx Discuss
- 9. How many simultaneous Telnet sessions does a Cisco router support by default?
Options- A. 2
- B. 3
- C. 4
- D. 5 Discuss
- 10. Which of the following commands sets the secret password to Cisco?
Options- A. enable secret password Cisco
- B. enable secret cisco
- C. enable secret Cisco
- D. enable password Cisco Discuss
TCP/IP problems
Search Results
Correct Answer: 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.
Correct Answer: 157, 0x9D
Explanation:
To turn a binary number into decimal, you just have to add the values of each bit that is a 1. The values of 10011101 are 128, 16, 8, 4, and 1. 128 + 16 + 8 + 4 + 1 = 157.
Hexadecimal is a base-16 number system. The values of hexadecimal are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, A, B, C, D, E, F-16 characters total, from which to create all the numbers you'll ever need. So, if 1001 in binary is 9, then the hexadecimal equivalent is 9. Since we then have 1101, which is 13 in binary, the hexadecimal answer is D and the complete hexadecimal answer is 0x9D.
Correct Answer: Proxy ARP
Explanation:
Proxy ARP can help machines on a subnet reach remote subnets without configuring routing or a default gateway.
Correct Answer: 2 and 3
Explanation:
ICMP is used for diagnostics and destination unreachable messages. ICMP is encapsulated within IP datagrams, and because it is used for diagnostics, it will provide hosts with information about network problems.
Correct Answer: Application
Explanation:
Both FTP and Telnet use TCP at the Transport layer; however, they both are Application layer protocols, so the Application layer is the best answer.
Correct Answer: Class C
Explanation:
A Class C network address has only 8 bits for defining hosts: 2
8 - 2 = 254.
Correct Answer: ARP
Explanation:
Address Resolution Protocol (ARP) is used to find the hardware address from a known IP address.
Correct Answer: 10xxxxxx
Explanation:
The range of a Class B network address is
128-191. This makes our binary range
10xxxxxx.
Correct Answer: 5
Explanation:
Cisco routers, if they do not have the Enterprise edition of the IOS, will default to 5 simultaneous Telnet sessions.
Correct Answer: enable secret Cisco
Explanation:
The enable secret password is case sensitive, so the second option is wrong. To set the
enable secret <password>, use the
enable secret <password> command from global configuration mode.
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