1A Cisco proprietary Layer 2 protocol used to gather information about Cisco devices sharing the same data link.
CDP
2How do you verify the status of CDP and display its information?
Use the show cdp command.
3How do you disable CDP on a specific interface?
Enter no cdp enable in interface configuration mode.
4How do you enable CDP globally on a Cisco device?
Enter cdp run in global configuration mode.
5Which command is used to determine the network layout and discover connected Cisco devices?
show cdp neighbors
6Which command discovers the IP address of a CDP neighbor?
show cdp neighbors detail
7What is LLDP?
Link Layer Discovery Protocol, a vendor-neutral neighbor discovery protocol similar to CDP.
8How do you enable LLDP globally on a Cisco network device?
Enter lldp run in global configuration mode.
9What additional configuration does LLDP require on specific interfaces?
It must be configured separately to transmit (lldp transmit) and receive (lldp receive) LLDP packets.
10What is the primary source of time for a Cisco router or switch upon boot?
The software clock.
11What protocol and port does NTP use?
UDP port 123.
12A level in the hierarchical system of time sources, defined as the number of hop counts from the authoritative source.
Stratum in NTP
13What is the maximum hop count (stratum level) in NTP before a device is considered unsynchronized?
15 (Stratum 16 indicates it is unsynchronized).
14Authoritative time sources, which are high-precision timekeeping devices.
Stratum 0 devices
15Which command configures a device to synchronize its time with an NTP server?
ntp server [ip-address]
16Which two commands verify that a device is synchronized with an NTP server?
show ntp associations and show ntp status
17What are the three elements of an SNMP system?
SNMP manager, SNMP agents (managed node), and Management Information Base (MIB).
18What UDP ports do SNMP managers and agents use?
SNMP queries use UDP port 161, and SNMP traps use UDP port 162.
19What does the SNMP get-request do?
Retrieves a value from a specific variable.
20What does the SNMP set-request do?
Stores a value in a specific variable or causes an action to occur.
21Unsolicited messages alerting the SNMP manager to a condition or event on the network.
SNMP traps
22Which SNMP version uses username authentication and provides data protection and encryption?
SNMPv3
23What are the two types of SNMP community strings?
Read-only (ro) and Read-write (rw).
24What uniquely identifies managed objects in the MIB hierarchy?
Object ID (OID).
25What protocol and port does Syslog use?
UDP port 514.
26What is the severity level of a Syslog Emergency message?
Level 0.
27What is the default format of syslog messages on Cisco IOS Software?
%facility-severity-MNEMONIC: description
28Which command forces logged events to display the date and time?
service timestamps log datetime
29Which command lists all available file systems on a Cisco device?
show file systems
30Which command copies the running configuration to a USB flash drive?
copy running-config usbflash0:
31What is the first step in the password recovery procedure for a Cisco device?
Enter the ROMMON mode.
32Which command in ROMMON sets the configuration register to ignore the startup config file?
confreg 0x2142
33Which command specifies the name and location of the Cisco IOS Software image to load during startup?
boot system