CISCO COMMANDS
CISCO PROTOCOLS
CISCO PORTS
CISCO OSI MODEL
CISCO TCP/IP MODEL
100
Display current routing protocols?
What is show ip protocols
100
Which layer 4 protocol is used for a Telnet connection? A. IP B. TCP C. TCP/IP D. UDP
Answer: Option B Explanation: Although Telnet does use TCP and IP (TCP/IP), the question specifically asks about layer 4, and IP works at layer 3. Telnet uses TCP at layer 4.
100
WHAT IS THE PORT NUMBER FOR ICMP REQUEST?
What is NONE, LAYER 3 FOR PING AND TRACE
100
If you use either Telnet or FTP, which is the highest layer you are using to transmit data? A. Application B. Presentation C. Session D. Transport
Answer: Option A 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.
100
What is Layer 5?
What is Application Layer
200
Display a summary of connected cdp devices
What is show cdp neighbor
200
Which of the following services use UDP? 1.) DHCP 2.) SMTP 3.) SNMP 4.) FTP 5.) HTTP 6.) TFTP A. 1, 3 and 6 B. 2 and 4 C. 1, 2 and 4 D. All of the above
Answer: Option A Explanation: DHCP, SNMP, and TFTP use UDP.
200
What is Secure FTP service, SSH access port number?
What is 22 / TCP
200
Which of the following are TCP/IP protocols used at the Application layer of the OSI model? IP TCP Telnet FTP TFTP A. 1 and 3 B. 1, 3 and 5 C. 3, 4 and 5 D. All of the above
Answer: Option C Explanation: Telnet, File Transfer Protocol (FTP), and Trivial FTP (TFTP) are all Application layer protocols. IP is a Network layer protocol. Transmission Control Protocol (TCP) is a Transport layer protocol.
200
___________is responsible for creating the frames that move across the network. These frames encapsulate the packets and use MAC addresses to identify the source and destination.
What is Data Link Layer
300
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. A. 1 only B. 1 and 2 C. 3 and 4 D. 4 only
Answer: Option B 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.
300
You want to implement a mechanism that automates the IP configuration, including IP address, subnet mask, default gateway, and DNS information. Which protocol will you use to accomplish this? A. SMTP B. SNMP C. DHCP D. ARP
Answer: Option C Explanation: Dynamic Host Configuration Protocol (DHCP) is used to provide IP information to hosts on your network. DHCP can provide a lot of information, but the most common is IP address, subnet mask, default gateway, and DNS information.
300
What port number is DNS?
What is 53
300
What layer in the TCP/IP stack is equivalent to the Transport layer of the OSI model? A. Application B. Host-to-Host C. Internet D. Network Access
What is Answer: Option B 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.
300
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? A. Application B. Host-to-Host C. Internet D. Network Access
Answer: Option C 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.
400
What saves the current configuration from DRAM to NVRAM?
What is copy running-config startup-config
400
Which statements are true regarding ICMP packets? They acknowledge receipt of a TCP segment. They guarantee datagram delivery. They can provide hosts with information about network problems. They are encapsulated within IP datagrams. A. 1 only B. 2 and 3 C. 3 and 4 D. 2, 3 and 4
Answer: Option C Explanation: Internet Control Message Protocol (ICMP) is used to send error messages through the network, but they do not work alone. Every segment or ICMP payload must be encapsulated within an IP datagram (or packet).
400
WHAT PORT NUMBER IS HTTP OVER SSL
What is 443
400
Routers operate at which layer of the OSI model? 1.) physical 2.) transport 3.) network 4.) MAC sublayer of the data link layer 5.) session
What is Network
400
What layer is messages PDU on the TCP/IP Layer 5 ?
What is Layer 5
500
View current configuration (DRAM)
What is show running-config
500
What protocol is used to find the hardware address of a local device? A. RARP B. ARP C. IP D. ICMP
Answer: Option B Explanation: Address Resolution Protocol (ARP) is used to find the hardware address from a known IP address.
500
PORT NUMBERS RANGE FROM O TO _________?
What is 65536
500
The layers of the OSI model, from the top down, are: 1.) application, presentation, session, transport, network, data link, physical 2.) session, presentation, data transport, MAC, network, physical 3.) physical, data link, network, transport, session, presentation, application 4.) presentation, application, session, network, transport, data link, physical 5.) application, encryption, network, transport, logical link control, physical
What is 1
500
What PDU is on Layer 4 of TCP/IP Layer 5?
What is Segments and Diagrams
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