Sr. No.
Question
1 Which layer of the OSI model is responsible for end-to-end communication?
2 Which IP address class provides up to 254 host addresses per network?
3 What is the default administrative distance of a static route?
4 Which command displays the routing table on a Cisco router?
5 What is the purpose of VLANs?
6 What is the subnet mask for a /27 network?
7 Which of the following is a valid IPv6 address?
8 What protocol does a switch use to prevent broadcast storms?
9 Which protocol is used to resolve IP to MAC addresses?
10 What is the maximum number of host IPs in a /24 subnet?
11 What is the purpose of NAT?
12 Which device separates broadcast domains?
13 What command is used to configure a hostname on a Cisco device?
14 Which protocol does ping use?
15 Which topology has a central device connecting all other devices?
16 What command shows current interface status?
17 Which address type is used in Ethernet frames?
18 Which of the following is NOT a dynamic routing protocol?
19 What port does SSH use?
20 Which type of cable connects a PC to a switch?
21 What is the purpose of DHCP?
22 What type of routing uses hop count as a metric?
23 What does 802.1Q define?
24 What Cisco command saves the running config to startup?
25 What is a private IP address?
26 What is the function of a default gateway?
27 What protocol is used to send emails?
28 What is the function of DNS?
29 What does the acronym CIDR stand for?
30 Which command enters interface configuration mode?
31 What type of address is 169.254.1.1?
32 What is the binary equivalent of 192?
33 What is the function of a switch?
34 What protocol is used for secure web traffic?
35 Which of the following is a Layer 7 device?
36 Which one is NOT a valid subnet mask?
37 What is the loopback IP address?
38 Which command shows directly connected networks?
39 What does TTL in an IP packet stand for?
40 What is port 443 used for?
41 Which of the following is a hybrid routing protocol?
42 Which cable is used to connect two switches?
43 What command is used to check connectivity?
44 What is VTY used for?
45 What command displays the MAC address table?
46 What is the first valid IP in a subnet?
47 What Cisco IOS mode is indicated by Switch(config)#?
48 What is the range of private IP addresses in Class B?
49 What is the minimum number of bits borrowed to create subnets?
50 What is the result of the command enable on a Cisco device?
51 Which switch feature shows “err-disabled” after a BPDU?
52 In EIGRP, what is the feasible distance?
53 Which statement about static routing is FALSE?
54 What happens when two VLANs communicate without a Layer 3 device?
55 What does a switch do when it receives a frame for an unknown destination MAC?
56 You connect a PC to a switch but can’t ping the gateway. What's likely the issue?
57 Which of the following is a symptom of a switching loop?
58 You see multiple MAC addresses on a single port. What does it indicate?
59 What is the administrative distance of EIGRP internal routes?
60 Which is TRUE about dynamic routing?
61 Which trunking protocol is Cisco proprietary?
A router receives routes from OSPF and RIP for the same destination. Which will it
62
choose?
63 Which command shows the root bridge of a VLAN?
64 In RSTP, what is the port state for an alternate port?
65 How many broadcast domains are created by a 48-port switch with no VLANs?
66 Which routing protocol uses cost as a metric based on bandwidth?
In a switching table, if MAC address X appears on two different ports, what does it
67
imply?
68 What feature prevents MAC flooding attacks on a switch?
69 Which type of OSPF router connects multiple areas?
70 Which protocol elects a root bridge?
71 In STP, what role does the port on the root bridge always assume?
A router has routes to the same destination via OSPF and EIGRP. EIGRP has AD of
72
170. Which is used?
73 Which OSPF table stores neighbor information?
74 What is the purpose of a DR in OSPF?
75 What does a router do when no route is found for a packet?
76 What layer does a router operate at?
77 What causes a switch to flood a frame?
78 What happens if you configure two VLANs on the same switch port?
79 How many equal-cost paths does OSPF support by default?
80 You see a port in err-disabled state. What could be a cause?
81 What must match for two OSPF routers to form adjacency?
82 What is the purpose of a routed port on a switch?
83 Which protocol operates at Layer 2 and helps identify Cisco neighbors?
84 Which method of port security allows only the first MAC to be learned?
85 What is the metric unit used by RIP?
86 Which is NOT a type of OSPF LSA?
87 Why would a switchport go into blocking state in STP?
88 Which is a valid reason to use EtherChannel?
89 What is the function of a loopback interface in routing?
90 A VLAN has been created, but hosts can't communicate. Most likely reason?
91 What is the purpose of DUAL in EIGRP?
92 Which command shows EIGRP neighbors?
93 What does it mean if STP convergence is slow?
94 What is the purpose of the root bridge in STP?
95 A switchport is in learning state. What does it do?
96 Which protocol supports summarization only at ABRs?
97 What is a characteristic of PVST+?
98 Which protocol prevents switching loops by placing ports into blocking state?
99 What is the default OSPF hello timer?
100 What is the first step in STP election process?
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Option 1
A. Data Link
A. Class A
A. 0
A. show route
A. To physically separate networks
Α. 255.255.255.192
A. 2001:db8::1
A. RIP
A. DNS
Α. 254
A. To assign IP addresses
A. Hub
A. set hostname
A. TCP
A. Mesh
A. show interface brief
A. IP
A. OSPF
A. 20
A. Crossover
A. Assign IP addresses dynamically
A. OSPF
A. Wireless standard
A. write memory
Α. 8.8.8.8
A. Route internal packets
A. FTP
A. Assign IP addresses
A. Central IP Distribution Routing
A. interface gig0/1
A. Public
Α. 11000000
A. Forward packets based on IP
A. HTTP
A. Hub
Α. 255.0.0.0
Α. 255.255.255.0
A. show ip interface brief
A. Time To Leave
A. Telnet
A. OSPF
A. Rollover
A. connect
A. Local console access
A. show arp
A. Network address
A. User EXEC
A. 10.0.0.0 - 10.255.255.255
A. 1
A. Enters configuration mode
A. PortFast
A. Backup path metric
A. It uses less bandwidth than dynamic routing
A. Communication is seamless
A. Drops it
A. Wrong DNS
A. High CPU on a router
A. Normal
A. 90
A. It doesn’t scale well
A. 802.1Q
A. RIP, because it’s simpler
A. show vlan
A. Blocking
A. 48
A. RIP
A. Host has two NICs
A. DHCP Snooping
A. ABR
A. RIP
A. Designated
A. OSPF
A. Routing table
A. To provide faster convergence
A. Drops it
A. Layer 1
A. Known destination MAC
A. Port becomes a trunk
A. 1
A. VLAN mismatch
A. IP addresses
A. Trunking
A. LLDP
A. Static
A. Bandwidth
A. Type 1
A. No MAC address learned
A. Spanning Tree bypass
A. Backup physical port
A. Wrong IP address
A. Path calculation
A. show ip eigrp neighbors
A. Switches are misconfigured
A. Assign VLANs
A. Forwards frames
A. RIP
A. One STP instance for all VLANs
A. STP
A. 10 seconds
A. Electing designated port
Option 2
B. Transport
B. Class B
B. 1
B. show routing
B. To logically separate broadcast domains
B. 255.255.255.224
Β. 192.168.1.1
B. STP
B. DHCP
B. 256
B. To translate private IPs to public IPs
B. Switch
B. name
B. UDP
B. Ring
B. show ip int brief
B. MAC
B. BGP
B. 21
B. Straight-through
B. Resolve domain names
B. BGP
B. Trunking for VLANs
B. copy run start
Β. 192.168.1.1
B. Resolve IPs to MAC
B. HTTP
B. Block unwanted content
B. Classless Inter-Domain Routing
B. config int
B. Loopback
Β. 10101010
B. Connect different networks
B. FTP
B. Router
Β. 255.255.255.128
B. 0.0.0.0
B. show cdp neighbors
B. Type Transfer Limit
B. FTP
B. RIP
B. Straight-through
B. ping
B. Web GUI access
B. show mac
B. First host
B. Privileged EXEC
B. 172.16.0.0 - 172.31.255.255
B. 2
B. Enables all interfaces
B. BPDU Guard
B. Best path metric to destination
B. It is more secure than dynamic routing
B. Only ARP works
B. Floods it out all ports except the one it came from
B. Incorrect default gateway on the PC
B. Duplicate MAC addresses
B. Possible hub connected
B. 110
B. It needs manual route configuration
B. VTP
B. OSPF, due to lower AD
B. show spanning-tree vlan 1
B. Listening
B. 1
B. EIGRP
B. There is a loop
B. Port Security
B. ASBR
B. STP
B. Blocking
B. EIGRP
B. LSDB
B. Reduce LSA flooding
B. Sends it to default route
B. Layer 2
B. Broadcast frame
B. Error occurs
B. 2
B. Incorrect IP
B. Hostnames
B. VLAN hopping
B. CDP
B. Sticky
B. Delay
B. Type 2
B. Link is down
B. Load balancing and redundancy
B. Test interface
B. Trunk not configured
B. Loop prevention and backup routes
B. show ip ospf neighbors
B. Using legacy STP
B. Forward all traffic
B. Learns MACs but doesn’t forward
B. EIGRP
B. Separate STP per VLAN
B. CDP
B. 5 seconds
B. Electing root bridge
Option 3
C. Network
C. Class C
C. 90
C. show ip route
C. To allow only wireless communication
C. 255.255.255.240
C. 10.0.0.1
C. OSPF
C. ARP
C. 255
C. To route traffic
C. Router
C. hostname
C. ICMP
C. Star
C. show status
C. IPv6
C. RIP
C. 22
C. Rollover
C. Translate IP to MAC
C. RIP
C. IP addressing
C. save config
C. 172.32.0.1
C. Send traffic to other networks
C. SMTP
C. Translate names to IPs
C. Class IP Distribution Rule
C. enter interface
C. APIPA
C. 11111111
C. Forward frames based on MAC
C. SSH
C. Firewall
C. 255.255.255.256
C. 127.0.0.1
C. show version
C. Time To Live
C. HTTPS
C. EIGRP
C. Crossover
C. trace
C. Remote Telnet/SSH access
C. show mac-address-table
C. Last host
C. Global Configuration
C. 192.168.0.0 - 192.168.255.255
C. 3
C. Moves to privileged EXEC mode
C. Root Guard
C. Interface bandwidth
C. It automatically adapts to network changes
C. Communication fails
C. Sends it to the router
C. MAC table is full
C. Broadcast storm
C. Spanning Tree failure
C. 170
C. It adapts automatically to network changes
C. ISL
C. RIP, due to longer history
C. show mac-address-table
C. Discarding
C. 0
C. OSPF
C. Port security is disabled
C. STP
C. DR
C. OSPF
C. Root
C. Both
C. Neighbor table
C. Assign IPs to routers
C. Broadcasts it
C. Layer 3
C. Unknown destination MAC
C. One VLAN is ignored
C. 4
C. Port security violation
C. Hello/dead timers, area ID, subnet
C. L3 communication without VLAN
C. STP
C. Dynamic
C. Hop count
C. Type 3
C. Prevent loop
C. Routing table reduction
C. Always up for router ID
C. Port speed mismatch
C. OSPF area comparison
C. show route eigrp
C. Using RSTP
C. Central point for loop-free path calculation
C. Blocks frames and MACs
C. OSPF
C. Works only on routers
C. VTP
C. 30 seconds
C. Blocking redundant links
Option 4 Answer Answer Explanation
D. Application 2 N/a
D. Class D 3 N/a
D. 120 2 N/a
D. show ip routing-table 3 N/a
D. To prevent routing loops 2 N/a
D. 255.255.255.248 2 N/a
D. 255.255.255.0 1 N/a
D. ARP 2 N/a
D. ICMP 3 N/a
D. 253 1 N/a
D. To encrypt traffic 2 N/a
D. Access Point 3 N/a
D. conf hostname 3 N/a
D. ARP 3 N/a
D. Bus 3 N/a
D. show interface status 2 N/a
D. DNS 2 N/a
D. Static 4 N/a
D. 23 3 N/a
D. Loopback 2 N/a
D. Encrypt data 1 N/a
D. EIGRP 3 N/a
D. Routing protocol 2 N/a
D. store config 2 N/a
D. 11.0.0.1 2 N/a
D. Encrypt traffic 3 N/a
D. SNMP 3 N/a
D. Encrypt traffic 3 N/a
D. Central Internet Data Routing 2 N/a
D. select interface 1 N/a
D. Multicast 3 N/a
D. 10000000 1 N/a
D. Translate IP addresses 3 N/a
D. HTTPS 4 N/a
D. Web proxy 4 N/a
D. 255.255.240.0 3 N/a
D. 192.168.0.1 3 N/a
D. show ip route 4 N/a
D. Transmission Time Limit 3 N/a
D. SMTP 3 N/a
D. BGP 3 N/a
D. Console 3 N/a
D. netstat 2 N/a
D. Powering devices 3 N/a
D. show ip arp 3 N/a
D. Broadcast address 2 N/a
D. Interface Configuration 3 N/a
D. 224.0.0.0 - 239.255.255.255 2 N/a
D. 4 1 N/a
D. Saves configuration 3 N/a
D. Loop Guard 2 N/a
D. Total hops 2 N/a
D. It is manually configured 3 N/a
D. VLANs merge 3 N/a
D. Sends an ARP request 2 N/a
D. Router interface is down 2 N/a
D. Low latency 3 N/a
D. MAC flapping 2 N/a
D. 120 1 N/a
D. It is less efficient than static routes 3 N/a
D. LACP 3 N/a
D. It will load-balance 2 N/a
D. show vlan brief 2 N/a
D. Learning 3 N/a
D. 24 2 N/a
D. BGP 3 N/a
D. Spanning tree is enabled 2 N/a
D. ARP Inspection 2 N/a
D. BDR 1 N/a
D. CDP 2 N/a
D. Forwarding 1 N/a
D. None 1 N/a
D. Topology table 3 N/a
D. Route traffic between areas 2 N/a
D. Sends ICMP request 2 N/a
D. Layer 4 3 N/a
D. Duplex mismatch 3 N/a
D. Both operate simultaneously 2 N/a
D. 16 3 N/a
D. STP loop 3 N/a
D. MTU only 3 N/a
D. QoS tagging 3 N/a
D. VTP 2 N/a
D. Restrict 2 N/a
D. MTU 3 N/a
D. Type 7 N/a
D. Duplex mismatch 3 N/a
D. VLAN creation 2 N/a
D. Increase bandwidth 3 N/a
D. DNS misconfigured 2 N/a
D. Route redistribution 2 N/a
D. show protocols 1 N/a
D. Multiple root bridges 2 N/a
D. Backup switch 3 N/a
D. Broadcasts only 2 N/a
D. BGP 3 N/a
D. Used for trunk negotiation 2 N/a
D. LLDP 1 N/a
D. 60 seconds 1 N/a
D. Assigning MAC addresses 2 N/a
