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- Question
What is the address range of a Class B network address in binary?
Options- A. 01xxxxxx
- B. 0xxxxxxx
- C. 10xxxxxx
- D. 110xxxxx
- Correct Answer
- 10xxxxxx
ExplanationThe range of a Class B network address is 128-191. This makes our binary range 10xxxxxx. - 1. What protocol is used to find the hardware address of a local device?
Options- A. RARP
- B. ARP
- C. IP
- D. ICMP Discuss
- 2. 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
- 3. 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 Discuss
- 4. Which of the following protocols uses both TCP and UDP?
Options- A. FTP
- B. SMTP
- C. Telnet
- D. DNS Discuss
- 5. 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
- 6. How many simultaneous Telnet sessions does a Cisco router support by default?
Options- A. 2
- B. 3
- C. 4
- D. 5 Discuss
- 7. 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
- 8. What keystroke will terminate setup mode?
Options- A. Ctrl+Z
- B. Ctrl+^
- C. Ctrl+C
- D. Ctrl+Shift+^ Discuss
- 9. If you delete the contents of NVRAM and reboot the router, what mode will you be in?
Options- A. Privileged mode
- B. Global mode
- C. Setup mode
- D. NVRAM loaded mode Discuss
- 10. You set the console password, but when you display the configuration, the password doesn't show up; it looks like this:
What cause the password to be stored like this?[output cut] Line console 0 Exec-timeout 1 44 Password 7098C0BQR Login [output cut]
Options- A. encrypt password
- B. service password-encryption
- C. service-password-encryption
- D. exec-timeout 1 35 Discuss
TCP/IP problems
Search Results
Correct Answer: ARP
Explanation:
Address Resolution Protocol (ARP) is used to find the hardware address from a known IP address.
Correct Answer: Class C
Explanation:
A Class C network address has only 8 bits for defining hosts: 2
8 - 2 = 254.
Correct Answer: 1 and 2
Explanation:
A 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.
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: 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.
Correct Answer: Ctrl+C
Explanation:
You can exit setup mode at any time by using the keystroke
Ctrl+C.
Correct Answer: Setup mode
Explanation:
If you delete the startup-config and reload the router, the router will automatically enter setup mode. You can also type
setup from privileged mode at any time.
Correct Answer: service password-encryption
Explanation:
The command
service password-encryption, from global configuration mode, will encrypt the passwords.
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