CCNA EXAM 2022| 164 QUESTIONS| WITH COMPLETE SOLUTIONS| VERIFIED

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TCP resides on what layer of the OSI model? Correct Answer: Transport, Layer 4 How many Bytes are in the Flag of an HDLC frame? Correct Answer: 1 byte What is a HDLC frame? Correct Answer: Hi... gh-level Data Link Control (HDLC) is a group of communication protocols of the data link layer for transmitting data between network points or nodes. Since it is a data link protocol, data is organized into frames. A frame is transmitted via the network to the destination that verifies its successful arrival. It is a bit - oriented protocol that is applicable for both point - to - point and multipoint communications. What portion of the MAC address indicates the originating networking equipment vendor? Correct Answer: The 1st octet or the first 8 bits. What is FCS in a frame? Correct Answer: Frame Check Sequence (FCS) is an error-detecting code. What is the SFD field of an Ethernet frame? Correct Answer: The SFD (start frame delimiter) is the eight-bit (one-byte) value that marks the end of the preamble. What are the different fields of a 802.11 MAC frame? Correct Answer: FC (frame control, 2 bytes) | DUR (duration, 2 bytes) | ADD1 (6 bytes) | ADD2 (6 bytes) | ADD3 (6 bytes) | SEQ (Sequence, 2 bytes) | ADD4 (6 bytes) | DATA (size varies) | FCS (frame check sequence, 4 bytes CRC value) Why would a physical interface on a switch display the following: Line Status: down Interface Status: down (err-disabled) Interface Status: err-disabled Correct Answer: Port security has disabled the interface. What parameters are used when connecting to the console of a Cisco switch? Correct Answer: 9600 (speed), None (parity), 8 (data bits), 1 (stop bits), None (flow control) What commands will erase NVRAM? Correct Answer: erase nvram (preferred), write erase and erase startup The password required to login to user mode through a console is called? Correct Answer: console password What commands will add a switch interface to vlan 20? Correct Answer: switchport mode access switchport access vlan 20 What is a runt frame and what is it likely caused by? Correct Answer: A runt frame is an Ethernet frame that is less than the IEEE 802.3's minimum length of 64 octets and has a bad FCS value (frame check sequence). Runt frames are most commonly caused by collisions. What happens to runt frames received by a Cisco Ethernet switch? Correct Answer: The frame is dropped. What is STP? Correct Answer: Spanning Tree Protocol (STP) is a link management protocol that provides path redundancy while preventing undesirable loops in the network. What is the correct order for STP? Correct Answer: 1. Elect a root bridge 2. Elect a root port for each non-root bridge 3. Elect a designated port for each segment. 4. Root ports and designated ports transition to the forwarding state. What command would be used to define the native VLAN for a truck port? Correct Answer: switchport trunk native vlan [vlan-id] What is the command to configure a truck port? Correct Answer: 3. switchport mode trunk What is a Ethernet giant frame? Correct Answer: One that is larger than 1,518 bytes and has a bad FCS (frame check sequence) value. How can you calculate the number of hosts in a subnet? Correct Answer: Using 2^n-2, where n is the number of 0 in the subnet mask. Example: /21 or 255.255.248.0 would be 11111111.11111111.11111000.00000000. There are 11 zeroes, so it would be 2^11-2=2,046. There would be 2,046 hosts in each subnet. What command should you issue on a switch port so that no more than two devices can send traffic into the port? Correct Answer: [Show More]

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