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Sunday, March 27, 2016
Cisco CLI Analyzer 2.0 Released - IOS and NX-OS support added!
Monday, March 14, 2016
Networking Questions 2016 - Part 3
The next installment of Six more random networking questions for your enjoyment :-)
1. When STP is converging no data can move through the switched network.
A) True
B) False
2. What should be carried out within the Cisco hierarchy at the distribution layer?
A) ACL
B) Security and network policies
C) VLANs
D) WAN access
E) All of the above
3. What protocol range would you use for IP in ACLs?
A) 1-99
B) 800-899
C) 200-299
D) 1000-1099
4. If applied to an interface what would this ACL do?
Router(config)#access-list 25 deny 172.32.10.0 0.0.0.255
Router(config)#access-list 25 permit any
A) Deny traffic from the 172.32.10.0 network
B) Deny SMTP traffic from the 172.32.10.0 network
C) Deny traffic from the host 172.32.10.0
D) Deny SMTP traffic from the host 172.32.10.0
E) Allow all traffic
5. Your network features a combination of Cisco, 3COM and Netgear switches. You have been tasked to set up VLANS on your switched network.
What trunking method should you use?
A) Inter-Switch Link
B) IEEE 802.1Q
C) You can't create VLANs by combining switches from different vend
6. When you connect to a remote router "out-of-band", via what port would you connect with?
A) Console port
B) Auxiliary port
C) Ethernet port
D) Serial port
Free Cisco labs for CCNA, CCNP and CCIE students!
Presented by René Molenaar - CCIE #41726
Presented by René Molenaar - CCIE #41726
1. Answer A
http://en.wikipedia.org/wiki/Spanning_tree_protocol
2. Answer E
Distribution layer (Workgroup layer): Ensures packets are properly routed between subnets and VLANs using LAN-based routers and Layer 3 switches. In the Distribution layer are:
- Firewalls, security, network policies, and network address translation (NAT) are configured.
- Routing between workgroups and VLANs is accomplished.
- Access lists, packet filtering, and queuing are implemented.
Router#configure terminal
Router(config)#access-list ?
<1-99> IP standard access list
<100-199> IP extended access list
<1100-1199> Extended 48-bit MAC address access list
<1300-1999> IP standard access list (expanded range)
<200-299> Protocol type-code access list
<2000-2699> IP extended access list (expanded range)
<700-799> 48-bit MAC address access list
rate-limit Simple rate-limit specific access list
4. Answer A
This standard ACL denys traffic from the 172.32.10.0 network and allows everything else.
5. Answer B
ISL is a Cisco proprietary frame tagging method and therefore only works with Cisco switches.
IEEE 802.1Q is the networking standard that supports virtual LANs (VLANs) on an Ethernet network.
6. Answer B
When a router is out-of-band (out of the network) you would connect remotely via a modem attached to the auxiliary port.
Check back regularly, more questions every week
(if time permits).
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almost always end up where I need to be.”
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Tuesday, March 1, 2016
Networking Questions 2016 - Part2
1. Lets start simple, What is port 23 used for?
A) FTP data
B) FTP program
C) Telnet
D) SMTP
E) TFTP
2. What is true about the MAC address?
A) Used to identify networks
B) Defined at the Network layer
C) Unique for every networked device in the world
D) Identical to the IP address
3. In a local broadcast all bits set to 1 are received by all hosts on local and remote broadcast domains?
A) True
B) False
4. IGRP advertises routes to interior, system and exterior routes
A) True
B) False
5. What is the correct sequence of Spanning Tree states?
A) Blocking, Listening, Learning, Forwarding, Disabled
B) Disabled, Blocking, Listening, Learning, Forwarding
C) Learning, Listening, Forwarding, Disabled, Blocking
D) Listening, Learning, Forwarding, Blocking, Disabled
6. What do asymmetric switches require?
A) memory buffers
B) extra ports
C) statically assigned ports only
D) high speed CAM
1. Answer C
The Telnet is a TCP/IP protocol which defines a text based communications session between a client and a host using TCP port number 23.
2. Answer C
MAC addresses are assigned by the manufacturer of a network interface card (NIC) and are stored in its hardware. A MAC address contains the manufacturer's identification number.
The MAC address may also be referred to as the burned-in address, hardware address, Ethernet address or physical address and is part of the Data Link layer, specifically the Media Access Control sub-layer of the Data Link layer.
http://en.wikipedia.org/wiki/MAC_address
3. Answer B
Routers don't forward broadcasts so local broadcasts will stay on the broadcast domain from which they originated.
4. Answer A
IGRP advertises three types of routes:
Interior routes are routes between subnets in the network attached to a router interface.
System routes are routes to networks within an autonomous system.
Exterior routes are routes to networks outside the autonomous system.
5. Answer A
STP switch port states:
Blocking
Listening
Learning
Forwarding
Disabled
A switch does not enter any of these port states immediately except the blocking state. When the Spanning Tree Protocol (STP) is enabled, every switch in the network starts in the blocking state and later changes to the listening and learning states.
6. Answer A
With ability for support of high bandwidth ports Asymmetric Switches require more Buffer memory for storing and forwarding of packets for fast processing.
Progressively harder ?? stay tuned for more
- thank you.
“A good teacher can inspire hope, ignite the
imagination, and instill a love of learning.”
― Brad Henry
― Brad Henry
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