Questions tagged [network-access]

One of the three layers of network design. The main characteristics of the network access layer is that it provides the access point for devices connecting to the network at a reduced "cost-per-port".

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18 views

So I'm confused on this question for CompTIA A+ [closed]

The website says the answer is "C.", But why would you ever pick WPA over WPA2 for anything like this? Isn't WPA2 more secure? Question 3 A human resources manager requests wireless APs to be set up ...
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50 views

VLAN access list for ip-helper addresses

I am forwarding two ports of broadcast UDP data from an inside private network VLAN (VLAN 100) to two outside private networks via WAN connections on an ISR4431. The broadcast forwarding seems to ...
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46 views

Why must host A continue to transmit after host b sends runt frame post collision on ethernet? (CSMA/CD)

Trying to understand example from computer networks: a systems approach ... -Host A sends Host B a frame at time t; Packet arrives at B at time t + d; (d = one link latency) Instant before frame ...
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63 views

Why computers can communicate on different networks and routers won't?

I have a problem that I can not understand it myself and I need some help. I'm doing a kind of challenge, well network challenge in cisco packet tracer. I have a .pka file that stands for Cisco Packet ...
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23 views

Router Extended Access Control List

Why can't we place the Extended ACL close to the destination not the source ? What will happen if we do so ?
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130 views

802.1X MAC auth : Dell N2048 switch returns malformed EAP packet

I'm trying to set up MAC authorization with 802.1X using FreeRADIUS, a Dell N2048 (DN OS6.3.3.9) switch as the authenticator and a Ubuntu machine as the supplicant. I've followed this guide for ...
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2answers
95 views

How to ping router from L3 switch

I am stuck in that that switch can't ping router and router can't ping switch. How to fix that ? I tried so much variants but them didn't help me Actually router must do static routing, that i am ...
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1answer
44 views

How cellular networks gets internet? [closed]

Mobiles get internet but how? From the towers, we used to get signals and communicate with others like calling or a message but coming to the internet how in the terms of networking terms like radio ...
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1answer
414 views

Deploying Virtual Stackwise Catalyst 9400

I am looking into deploying Virtual Stackwise on the Catalyst 9400 series switches. I wanted to know based on best practices where should the VSL links be deployed on the Sups or the modules? Is there ...
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2answers
50 views

should phy layer and mac layer be designed together?

I have a question about the independence of the layers. I know that the layers in protocol stack are designed in a way to be independent from each other. I want to know does it mean also that we can ...
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1answer
687 views

What is Open Radio Access Network?

what is the concept of this open radio access networks?? more specifically what is this "open" for? how is it different from those of general RAN?
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1answer
98 views

ASA 5505 cant access inside network from Anyconnect SSL Connection

So I have a ASA I can connect via SSL perfectly fine receiving internet.My issue is that I cannot ping any device on the network especially the inside network on my router. My topology is a ASA 5505 - ...
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383 views

Assigning a single switchport to different VLANs

I've been trying to figure out how to achieve the outcome below. VLAN Name Status Ports ---- -------------------------------- --------- ------------------------------- ...
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1answer
56 views

How do I block IPs on my network? [closed]

I manage a network meant for specific people, who in turn illegally share the Wifi SSID logins with friends (and so repeated changing of passwords isn't a good option). How do I configure the border ...
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2answers
126 views

IP Domain-name on aggregation layer switch

Hi I was trying to generate ssh key for a switch I read that , ssh key is generated as a combination of hostname and domain-name I created a domain name like test But doubt is , why isn't the ...
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1answer
868 views

DCF and PCF in Wifi-networks

I am studying, trying to learn how DCF (Distributed Coordination Function) and PCF (Point Coordination Function) works as access methods in WiFi, and how they relate to infrastructure vs ad hoc ...
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129 views

Network segmentation with VLAN and MAC auth: thoughts about implementation

Currently we have a medium-sized, flat network with some DHCP pools. This configuration isn't satisfying us anymore, as everyone can see everything on the network and it may leads to security issues. ...
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1answer
54 views

What's the meaning of “3D Universal Edge Routers”?

What's the meaning of "3D Universal Edge Routers"? I often see this term on Internet, but I do not understand what it stands for. Such as "MX240 3D Universal Edge Router", "MX480 3D Universal Edge ...
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35 views

Are there any advantage of using multiple threads for a file upload, for an internet connected node? [closed]

I got asked in an intervew recently to design a file upload feature. After initial discussion, The interviewer asked if I can design for multiple threads. My thought was, As the network bandwidth is ...
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592 views

Cisco 2960-S switch with MAB and Packetfence Web Authentication

I am trying to set up Packetfence In my corporate environment for guest users, with MAC access bypass. i have done everything like in the official Packetfence installation guide https://packetfence....
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1answer
109 views

Network routing/WAN failover

Hi any one recommend me WAN Fail-over in Cisco 2811 router in virtual interfaces I already try this configuration. but its not working ip route 0.0.0.0 0.0.0.0 192.168.86.1 ip route 0.0.0.0 0.0.0....
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1answer
61 views

Network ( routing and switching) , security

In my company network i am installing new cisco2811 router but i have problem, my LAN network can not ping and access network. i get point to point internet from ISP. PTP IP is 192.186.86.200/24 and ...
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3k views

How does the ARP table work in case of the Gateway Router?

Suppose I am a host, I understand how ARP works in case I address an IP within my subnet. For each IP address there is a corresponding MAC address, and the owner responds to my broadcast ARP query. ...
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1answer
424 views

How should I connect two sites through the internet? [closed]

I have two sites which are 3km away from each other, both sites have internet access from the same ISP. I would like both sites to have access to each other throught the internet routers (TP-Link TD-...
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1answer
76 views

Options for Company A server access to Company B network (on same premises)?

I'm looking for the best way to allow access to another company's server from within our network (We are both located on same physical site). At the moment Company B have limited infrastructure and ...
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1answer
159 views

Authorize IoT devices to connect to a WPA2 network without a password

I have an air quality IoT device that connects to WiFi and report data to the cloud and are planning to install 100+ devices at a customer location. To install a device, the customer has to connect to ...
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2answers
1k views

Cisco ASA 5510 implicit deny dropping traffic despite permit any ACL

I'm trying to allow VPN access through a specific public IP address on our company ASA. The ASA is currently configured with a /29 public IP address as follows: Interface Ethernet0/0 "outside" IP ...
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273 views

Accessing Servers behind double NAT [closed]

Basically, I want to know every possible way to access Linux servers or any other devices located behind ISP'S (Carrier-grade NAT) and our local NAT. I have used VPN and forward-reverse tunneling ...
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1answer
218 views

MAC ACL to prevent access to unauthorized computers

My company wanted to prevent rogue PCs from being connected to our network. Network access must be allowed only for our company users and specifically for PCs, Printers.. that are provided by the ...
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5answers
914 views

Access non-public IP computer

I am looking into methods how to access my PC from internet. I do not have a public IP (neither for my router nor local PC). I know I can do 2 things: ask for public IP and simply port forward ...
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1answer
35 views

Access Control Permissions

I have created a topolgy in packet tracer displaying two networks. I have cpnfigured VLANs on both of the networks and configured access control lists. However, I would like to configure access ...
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1answer
1k views

Can not access my router externally (from internet) [closed]

I have a router Cisco 900E. I am trying to access the router externally(from internet. Non local device). I read a lot about the issue and configured everything suggested. I enabled remote access via ...
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2answers
467 views

Unbundling local loop

When we are dealing with local loop, we indicate the last mile of connection from the CABINET (or whatever else) to the subscriber. Now, I'm asking to you, the local loop is the medium of the access ...
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1answer
7k views

Cisco port security static vs sticky+static

I don't see a different between the two. Both make it to the running config. 1) sticky + static Switch1(config-if)#switchport port-security mac-address sticky ? H.H.H 48 bit mac address Switch1(...
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1answer
284 views

Small office network setup help

We got a Linksys LGS552p switch (192.168.50.149), and a TZ400 Firewall (192.168.50.1) behind an "AT&T Modem", but we have external an IP address for the TZ400. I need to setup VLANs: 90 for ...
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1answer
379 views

Exposing server to external world [closed]

In my work network I have many machines (local and external). I mean that some machines expose to world website of company, another one exposes repository and so on. There are a lot of only local ...
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1answer
832 views

Tablet losing connection when switching to another router [closed]

Our organization has a very long hall way. I have two WiFi routers in the hall, 1 on the West end and one on the East end. When an employee walks from West end to the east in, the tablet switches to ...
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1answer
1k views

watch guard not allowing ping or traffic through wireless client

I have setup a little wireless network for some plcs we installed. When we connect directly to the switch or moxa awk 1131, we can ping all ip's 61.1 to 61.6 and also the gateway and get internet ...
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2answers
135 views

L2 network design questions

Good afternoon everyone. I would like to know the textbook answer to a network I've been asked to assist with. I have an IT cupboard which serves the location as the MDF. I then have a variety of ...
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1answer
941 views

Can't connect to FTP [closed]

I am using Beetel 777VR1 with Airtel Broadband. I am trying to connect with a FTP server but I am not able to access that. However with same credentials when I try to connect with my mobile ...
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1answer
172 views

Can a fortigate firewall know which device tried to access its restricted url?

In my network, a specific url is being blocked by fortiguard firewall. Now I want to know which all devices had tried to access that blocked url. I traced the mac address inside the packet. But how ...
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4answers
10k views

What is a “routable” IP? [closed]

Short bg: I wanted to host a website on my laptop (192.168.0.102) via apache server. I set up port 8080 and forwarded the port that I was able to access it via 192.168.0.102:8080. Then there was a ...
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2answers
192 views

Mobile IP in a large-ish IPv4 network

So we are looking into implementing IP mobility in our network. The use case would be for a laptop to be able to roam between wired and wireless mode of operation while retaining all TCP/UDP based ...
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1answer
851 views

How to force users to authenticate to get IP adress from DHCP?

Can You help me !! I want to force users to authentificate to get IP from DHCP-server (win server) if not they can't get ip @ adress !! even they are connected to network
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1answer
94 views

If multiple PC's are communicating to a server via a router, is the individual PC network traffic isolated to the respective PC's network?

I currently have multiple servers which are all on their own separate networks (each server on a different network talking to other devices). I want to implement a common central data server which ...
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2answers
89 views

Isolating a workstation on a network for remote access by contractors

Is it possible to isolate a computer on a network such that it can be accessed remotely by contractors, but not have access to any of the other machines on the network in any way? I understand it ...
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1answer
817 views

802.1x authentication and dynamic VLAN assignment of VLAN tagged frames

I want to implement a Network Access Control ( NAC ) infrastructure in my LAN. My topology is something like: PC -> ( Untagged Port - PVID 100 - Non 802.1x capable smart switch ) -> ( Hybrid port - ...
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1answer
101 views

Cisco Prevent Access to VLANS but Allow Some Machines by MAC

I am having issues with a Cisco 1921 when it comes to access lists and vlans. I have my vlan configured and interface with IP as well as the access group assigned to the vlan interface. interface ...
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2answers
56 views

How to connect 2 routers through the internet? [closed]

I have 2 branches and I would like to connect them together through the internet they are in 2 different cities so how this work and what protocols should I use?
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2k views

Cisco ASA VPN disconnecting regularly random time

We have Cisco ASA VPN IPSec with Sonicwall but we are seeing randomly after 8 hours or sometime 10 hours. I am unable to trace issue so just wonder is there a simple setting to renegotiate tunnel ...